˜_•¶ƒŠƒXƒg
- gA C3-symmetric chiroptical molecular propeller based on hexakis(phenylethynyl)benzene
with a threefold terephthalamide: stereospecific propeller generation through
the cooperative transmission of point chiralities on the host and guest
upon complexationh
Chem. Commun., 49, 10352-10354 (2013).
Ryo Katoono, Hidetoshi Kawai, Masakazu Ohkita, Kenshu Fujiwara, and Takanori
Suzuki
- gHydrindacene-Based Acetylenic Macrocycles with Horizontally and Vertically
Ordered Functionality Arraysh
Chem. Eur. J., 19, 4513-4524 (2013).
Hidetoshi Kawai, Tatsuya Utamura, Erina Motoi, Tomoko Takahashi, Hiroyoshi
Sugino, Manabu. Tamura, Masakazu Ohkita, Kenshu Fujiwara, Takao Saito,
Takashi Tsuji, and Takanori Suzuki
- gPhotophysical Characteristics of 4,4'-Bis(N-carbazolyl)tolan Derivatives and Their Application in Organic Lightemitting
Diodesh
Journal of Luminescence, 131, 1520-1524 (2011).
Masakazu Ohkita, Ayataka Endo, Kimihiro Sumiy, Hajime Nakanotani, Takanori
Suzuki, and Chihaya Adachi
- gSuperperiodic Assembly of 2,6-Diethynylpyridine through Weak Hydrogen
Bonds at the 1-Phynyloctane/HOPG Interfaceh
Langmuir, 24, 5650-5653 (2008).
Joe Otsuki, Yuki Arai, Makoto Amano, Hirokazu Sawai, Masakazu Ohkita, Tomohiro
Hayashi, and Masahiko Hara
- gThe First Stable Tetraarylacenaphthenequinodimethanes: Preparation, Highly
Deformed Structure, and Reversible Interconversion with Acenaphthylene-5,6-diyl
Dicationic Dyesh
Tetarahedron Lett., 47, 467-471 (2006).
Takanori Suzuki, Shinichi Iwashita, Tsuyoshi Yoshino, Hidetoshi Kawai,
Kenshu Fujiwara, Masakazu Ohkita, Takashi Tsuji, Kazunori Ono, and Masami
Takenaka
- gMacrocyclic and acyclic bis(2,5-diphenyl-1,3,4-oxadiazole)s with
electron-transporting and hole-blocking ability in organic electroluminescent
devicesh
Macromolecular Chemistry and Physics, 206,
1576-1582 (2005).
Katsuhiko Ono, Seiichi Ezaka, Akinori Higashibata, Ryohei
Hosokawa, Masakazu Ohkita, Katsuhiro Saito, Michitaka Suto, Masaaki Tomura,
Yosuke Matsushita, Shigeki Naka, Hiroyuki Okada, and Hiroyosh Onnagawa
- gTetracyanoanthraquinodimethanes with a Chiral Amide Group: Preparation,
Properties, and Charge-Transfer Photochirogenetic Reaction with
1,2-Dianisylacenaphthene-1,2-diolh
J. Org. Chem., 70, 5592-5598 (2005).
Takanori Suzuki, Koji Ichioka, Hiroki
Higuchi, Hidetoshi Kawai, Kenshu Fujiwara, Masakazu Ohkita, Takashi Tsuji, and
Yasutake Takahashi
- gTwo Morphologies of Stable, Highly Ordered Assemblies of a
Long-Chain-Substituted [2 x 2] Grid-Type FeII Complex Adsorbed on
HOPGh
Eur. J. Inorg. Chem., 2641-2647 (2005).
Ahmed Mourran, Ulrich Ziener, Martin Moller, Esther Breuning, Masakazu
Ohkita, and Jean-Marie Lehn
- gMolecular Arrangement in the Cocrystals of 1,1f,3,3f
-Tetramethyl-2,2f-bi-1H-imidazolium Bis(tetraphenylborate) with Ketone,
Aldehyde, and Nitrile as Guest Moleculesh
Bull. Chem. Soc. Jpn.,
78, 867-872 (2005).
Katsuhiko Ono, Takeshi Iwao, Hideki Uchiumi,
Takahisa Suzuki, Masaaki Tomura, Masakazu Ohkita, and Katsuhiro Saito
- gSynthesis and Properties of Pyrazino[2,3-g]quinoxaline Derivatives:
Blue and Green Fluorescent Materials with Electron
Affinityh
Heterocycles, 63, 2207-2210 (2004).
Katsuhiko Ono,
Yutaka Okazaki, Masakazu Ohkita, Katsuhiro Saito, and Yoshiro Yamashita
- gElectrochemical Polymerization of Tetramethylene-Crosslinked
Bis(2,5-di-2-thienyl-1H-pyrroleh
Heterocycles, 64,
223-228 (2004).
Katsuhiko Ono, Hiroaki Totani, Masakazu Ohkita, Katsuhiro
Saito, and Masaki Kato
- gKinetic Stabilization of the o-Quinoidal 3,4-Benzotropone Systemh
Org. Biomol. Chem., 2, 2421-2425 (2004).
Masakazu Ohkita,
Kieko Sano, Katsukiko Ono, Katsuhiro Saito, Takanori Suzuki, and Takashi Tsuji
- gSynthesis and Characterization of Hexakis(4-pyridylethynyl)benzene and
Hexakis(5-pyrimidylethynyl)benzeneh
Heterocycles, 63, 1537-1540
(2004).
Masakazu Ohkita, Chihaya Adachi, Miki Kawano, and Takanori Suzuki
- gPeri-Interaction between Diarylmethyl and Diarylmethylium Units in
1,8-Disubstituted Naphthalenes: Preference of Localized Structure for the C-H
Bridged Carbocationh
Tetrahedron Lett., 45, 4553-4558
(2004).
Hidetoshi Kawai, Takayuki Nagasu, Takashi Takeda, Kenshu Fujiwara,
Takashi Tsuji, Masakazu Ohkita, Jun-ichi Nishida, and Takanori Suzuki
- gThree-Way-Output Response System by Electric Potential: UV-Vis, CD and
Fluorescence Spectral Changes upon Electrolysis of the Chiral Ester of
Tetracyanoanthraquinodimethaneh
Tetrahedron Lett., 45, 3027-3030 (2004).
Hiroki Higuchi, Koji Ichioka,
Hidetoshi Kawai, Kenshu Fujiwara, Masakazu Ohkita, Takashi Tsuji, and Takanori
Suzuki
- gπ-Extended o-Quinoidal Tropone Derivatives: Experimental and
Theoretical Studies of Naphtho[2,3-c]tropone and
Anthro[2,3-c]troponeh
Org. Biomol. Chem., 2, 1044-1050
(2004).
Masakazu Ohkita, Kieko Sano, Takanori Suzuki, Takashi Tsuji, Tadatake
Sato, and Hiroyuki Niino
- gSynthesis and Properties of 9,9f -Diaryl-4,5-diazafluorenes: A New Type of
Electron-transporting and Hole-blocking Material in EL Deviceh
Chem.
Lett., 33, 276-277 (2004).
Katsuhiko Ono, Tomoki Yanase, Masakazu
Ohkita, Katsuhiro Saito, Yosuke Matsushita, Shigeki Naka, Hiroyuki Okada, and
Hiroyoshi Onnagawa
- gExperimental and Computational Studies on The Infrared Spectra of
3,4-Benzotropone and Naphtho[2,3-c]tropone: Medium Effects on The Molecular Structures of The Troponesh
J. Phy. Chem. A, 108,
721-726 (2004).
Tadatake Sato, Hiroyuki Niino, and Masakazu Ohkita
- g[2π + 2s] Type Cycloaddition
Reactions of Naphtho[b]cyclopropene with Trithiocarbonyl Compounds to
form 1,3-Dihydronaphtho[2,3-c]thiophene
Derivativesh
Heterocycles, 62, 773-778 (2004).
Katsuhiro Saito, Yasuhiro
Ohzone, Yoji Kondo, Katsuhiko Ono, and Masakazu Ohkita
- gDevelopment of Novel π-Electron Systems with Unique Structures and
Functionsh in Fusion of Nanotechnology and Organic Semiconductor, Edited
by H. Sasabe, p.98-104 (2004).
Masakazu Ohkita
- gFunctionalization and Kinetic Stabilization of the [4]Paracyclophane System
and Aromaticity of Its Extremely Bent Benzene Ringh
J. Am. Chem. Soc.,
125, 951-961 (2003).
Takashi Tsuji, Masahiro Okuyama, Masakazu Ohkita,
Hidetoshi Kawai, and Takanori Suzuki
- gSolid State and Solution Conformation of 2-Pyridinecarboxylic Acid
Hydrazines: a New Structural Motif for Foldamersh
Tetrahedron Lett.,
44, 1421-1424 (2003).
Joachim Garric, Jean-Michel Leger, Axelle
Grelard, Masakazu Ohkita, and Ivan Huc
- gElectrochemical Synthesis and Properties of
Poly[1,4-bis(N-pyrrolylalkoxy)benzene]s with a Three-dimensional
Crosslinked Structureh
Chem. Lett., 516-517 (2003).
Katsuhiko Ono,
Satsuki Yamada, Masakazu Ohkita, Katsuhiro Saito, Shoji Tanaka, and Takamasa
Hanaichi
- g[2π + 2s]Type Cycloaddition
Reactions of Naphtho[b]cyclopropene with Imine or Carbonyl Derivatives
Conjugated with Heteroaromatic Ring to Form Naphtho[b]dihydropyrroles or
Furansh
Heterocycles, 60, 773-778 (2003).
Katsuhiro Saito,
Katsuhiko Ono, Masakazu Ohkita, Machiko Fukaya, Kotaro Ono, and Yoji Kondo
- gReactions of Naphtho[b]cyclopropene with Isothiocyanate Derivatives
to Give [2π + 2s] Type Cycloadducts
Using the Thiocarbonyl Moieties As 2π Componentsh
Heterocycles,
61, 281-286 (2003).
Katsuhiro Saito, Satoshi Hagari, Naoko Ito, Tomoko
Kuriyama, Katsuhiko Ono, and Masakazu Ohkita
- gChiral Electron Donors and Acceptors: Novel Electrochiroptical
Responseh
Syn. Met., 357-358 (2003).
Takanori Suzuki, Jun-ichi
Nishida, Erika Hirota, Masakazu Ohkita, and Takashi Tsuji
- gSupramolecular Graphyne: a C(sp)–H•••N Hydrogen-Bonded Unique Network
Structure of 2,4,6-Triethynyl-1,3,5-triazineh
Chem. Commun., 3054-3055
(2002).
Masakazu Ohkita, Miki Kawano, Takanori Suzuki, and Takashi Tsuji
- gIntramolecular Diels-Alder Reaction of Cyclopenta-1,3-diene Derivatives
Generated in Situ from 4-(Pent-4-enyl)cyclopent-2-enone Ethylene Ketalsh
J. Chem. Soc., Perkin Trans. 1, 366-370 (2002).
Masakazu Ohkita,
Hidetoshi Kawai, and Takashi Tsuji
- gElectrochiroptical Response of a Hexaarylethane Derivative with a Helical
π-Skeleton: Drastic UV-Vis and CD Spectral Changes upon Electrolysis of
4',5'-Dibromodispiro[xanthene-9,9(9'H,10'H)-phenanthlene-10',9''-xanthene]h
J.
Chem. Soc., Perkin Trans. 2, 1937-1942 (2002).
Takanori Suzuki, Rie
Yamamoto, Hiroki Higuchi, Erika Hirota, Masakazu Ohkita, and Takashi Tsuji
- gPreparation and Kinetic Stabilization of Highly Strained
Paracyclophanesh
Bull. Chem. Soc. Jpn., 75, 415-433
(2002).
Takashi Tsuji, Masakazu Ohkita, and Hidetoshi Kawai
- gSynthesis and Characterization of [46]Paracyclophanedodecayne
Derivativeh
Chem. Commun., 2570-2571 (2001).
Masakazu Ohkita, Kohta
Ando, and Takashi Tsuji
- gA Redox Switch Based on Dihydro[5]helicene: Drastic Chiroptical Response
Induced by Reversible C-C Bond Making/Breaking upon Electron Transferh
Angew. Chem. Int. Ed., 40, 3251-3254
(2001).
Jun-ichi Nishida, Takanori Suzuki, Masakazu Ohkita, and Takashi Tsuji
- gPolar Assembly of 2,6-Diethynylpyridine Through C(sp2sp)-HcN, C(sp)-Hcπ and π-π Stacking Interactions: Crystal Structure
and Nonlinear Optical Propertiesh
Chem. Lett., 988-989 (2001) .
Masakazu Ohkita,
Takanori Suzuki, Keitaro Nakatani, and Takashi Tsuji
- gExperimental and Computational Studies of Naphtho[2,3-c]tropone: a Highly
Polarized Novel Tropoid Systemh
Tetrahedron Lett., 7295-7297
(2001).
Masakazu Ohkita, Kieko Sano, Takanori Suzuki, and Takashi Tsuji
- gDual-Mode Electrochromism Switched by Proton Transfer: Dynamic Redox
Properties of Bis(diarylmethylenium)-Type Dyesh
Chem. Commun.,
1574-1575 (2001).
Takanori Suzuki, Hiroki Higuchi, Masakazu Ohkita, and
Takashi Tsuji
- gCrystal Engineering Using Very Short and Linear C(sp)-HcN Hydrogen Bonds:
Formation of Head-to-Tail Straight Tapes and Their Assembly into Nonlinear
Optical Polar Crystalsh
Chem. Commun., 1454-1455 (2001).
Masakazu
Ohkita, Takanori Suzuki, Keitaro Nakatani, and Takashi Tsuji
- gGeneration and Amphoteric Redox Properties of Novel Neutral Radicals with
the TTF-TCNQ Hybrid Structureh
Heterocycles, 54, 387-394
(2001).
Takanori Suzuki, Masahiro Yamada, Masakazu Ohkita, and Takashi Tsuji
- gPreparation, X-ray Structures and Unique Redox Reactions of Novel
2,2'-(2,2-Dimethylpropane-1,3-diylidene)bis(1,3-benzodithiole)-type Electron
Donors Fused with a Naphthalene Ringh
J. Chem. Soc., Perkin Trans. 1,
3417-3420 (2000).
Takanori Suzuki, Tsuyoshi Yoshino, Masakazu Ohkita, and
Takashi Tsuji
- gKinetic Stabilization of the [1.1]Paracyclophane System: Isolation and
X-ray Structural Analysis of a [1.1]Paracyclophane Derivative and Its
Interconversion with the Transannular Adducth
Chem. Eur. J., 6,
4177-4187 (2000).
Hidetoshi Kawai, Takanori Suzuki, Masakazu Ohkita, and
Takashi Tsuji
- gPreparation, Structure, and Unique Redox Properties of Mono-, Bis-, and
Tris(diarylmethylene)-1,3,5-trithanes and Related Compoundsh
J. Org.
Chem., 65, 5514-5521 (2000).
Takanori Suzuki, Tsuyoshi Yoshino,
Jun-ichi Nishida, Masakazu Ohkita, and Takashi Tsuji
- gSyntheses of Acetylenic Oligophenylene Macrocycles Based on a Novel Dewar
Benzene Building Block Approachh
J. Org. Chem., 65, 4385-4390
(2000).
Masakazu Ohkita, Kohta Ando, Takanori Suzuki, and Takashi Tsuji
- gA 2,3,5,6-Tetramethylenebicyclo[2.2.0]hexane Derivative: a Novel Bisdiene
Molecule That Produces a Dewar Benzene Skeleton upon Two Successive Diels-Alder
Reactions with Dienophilesh
J. Chem. Soc., Perkin Trans. 1, 1971-1975
(2000).
Masakazu Ohkita, Kieko Sano, Sotoyuki Dohba, Yuko Fujita, Takanori
Suzuki, and Takashi Tsuji
- gPreparation, Structure, and Redox Reactions of Nine-Menbered Cyclic
Peroxides: a Novel Electrochromic System Undergoing Reversible Extrusion and
Trapping of O2h
Angew. Chem. Int. Ed., 39, 1804-1806
(2000).
Takanori Suzuki, Jun-ichi Nishida, Masakazu Ohkita, and Takashi Tsuji
- gMultiturn Helical Self-Organization of Extended Alternating Pyridine–Pyrimidine
Strandsh
Heterocycles, 52, 103-109
(2000).
Masakazu Ohkita, Jean-Marie Lehn, Gerhard Baum, and Dieter Fenske
- gFirst Dewar Benzene Approach to Acetylenic Oligophenylene Macrocycles:
Synthesis and Structure of a Molecular Rectangle Bearing Two
Spindlesh
Chem. Commun., 83-84 (2000).
Masakazu Ohkita, Kohta Ando,
Ken-ichi Yamamoto, Takanori Suzuki, and Takashi Tsuji
- gSynthesis and Reaction of 1,4-Acetal-bridged 2,3,5,6-Tetramethylidenebicyclo[2.2.0]hexane:
The First Diels-Alder Route to Dewar Benzenesh
Chem. Commun., 1999-2000 (1999).
Masakazu Ohkita,
Takanori Suzuki, and Takashi Tsuji
- gHelicity Coding: Programmed Molecular Self-Organization of Achiral Nonbiological
Strands into Multiturn Helical Superstructures: Synthesis and Characterization
of Alternating Pyridine-Pyrimidine Oligomersh
Chem. Eur.
J., 5, 3471-3481 (1999).
Masakazu Ohkita, Jean-Marie Lehn, Gerhard
Baum, and Dieter Fenske
- gGeneration, Spectroscopic Characterization, and Reactions of
3,4-Benzotropone. Distinctive Photochemical Behavior of
6,7-Benzobicyclo[3.2.0]hepta-3,6-dien-2-one in Rigid Glass at Low Temperature
and in Fluid Solutionh
J. Am. Chem. Soc., 121, 4589-4597
(1999).
Masakazu Ohkita, Shinya Nishida, and Takashi Tsuji
- gA Kinetically Stabilized [1.1]Paracyclophane: Isolation and X-Ray
Structural Analysish
Angew. Chem. Int. Ed., 37, 817-819
(1998).
Hidetoshi Kawai, Takanori Suzuki, Masakazu Ohkita, and Takashi Tsuji
- g[1.1]Paracyclophane. Photochemical Generation from the Corresponding
Bis(Dewar Benzene) Derivative and Theoretical Study of Its Structure and Strain
Energyh
J. Am. Chem. Soc., 119, 8425-8431 (1997).
Takashi
Tsuji, Masakazu Ohkita, Tomohisa Konno, and Shinya Nishida
- gTricyclo[4.2.2.22,5]dodeca-1,3,5,7,9,11-hexaene: Generation and
Chemical Trapping of the 3,4-Dicyano Derivativeh
Chem. Commun.,
2151-2152 (1997).
Takashi Tsuji, Masahiro Okuyama, Masakazu Ohkita, Toshiro
Imai, and Takanori Suzuki
- gThe First Observation of Thermal Transformation of Strained Paracyclophane
into the Dewar Isomerh
Chem. Commun., 1277-1278 (1997).
Masahiro
Okuyama, Masakazu Ohkita, and Takashi Tsuji
- gDirect Synthesis of 2-Norbornanone Dithioacetals from 2-Cyclopentenone
Dithioacetals and Dienophiles. Synthetic Application of Thermal Interconversion
between Cyclic Dithioacetals and the Ring-Opened Vinyl Sulfide
Formsh
Tetrahedron, 52, 9979-9990 (1996).
Masakazu Ohkita,
Osamu Nishizawa, Toshiro Imai, Shinya Nishida, and Takashi Tsuji
- u”ñ”j‰ó“Ç‚Ýo‚µ‹@”\‚ð”õ‚¦‚½Œõ‰ž“š«•ªŽq‘fŽqv
‰»Šw‚ÆH‹ÆC49ŠªC5†C702i1996jD
‘å–k‰ëˆê
- gReaction of C60 with Cyclopent-2-enone Acetals. A Convenient
Access to Chiral C60 Derivati vesh
J. Chem. Soc., Chem.
Commun., 1769-1770 (1995).
Masakazu Ohkita, Koh Ishigami, and Takashi
Tsuji
- gRecent Advances in Synthesis of Cyclopropanesh in The Chemistry of the
Cyclopropyl Group, Vol. 2, Edited by Z. Rappoport, John Wily, Chapter 5,
p.261-318 (1995).
Masakazu Ohkita, Shinya Nishida, and Takashi Tsuji
- gA One-Step Synthesis of 2-Norbornanone Ethylene Acetals from
2-Cyclopenten-1-one Ethylene Acetals and Dienophiles via [2+4]
Cycloaddition of in Situ Generated
2-(2-Hydroxyethoxy)cyclopenta-1,3-dienes and Intramolecular
Reacetalizationh
J. Org. Chem., 58, 5200-5208
(1993).
Masakazu Ohkita, Osamu Nishizawa, Takashi Tsuji, and Shinya Nishida
- g[1.1]Paracyclophane. Spectroscopic Evidence for Generation of the
Bis(methoxycarbonyl) Derivativeh
J. Am. Chem. Soc., 115,
5284-5285 (1993).
Takashi Tsuji, Masakazu Ohkita, and Shinya Nishida
- gSingle Step Synthesis of Norbornan-2-one Dithioacetals from
Cyclopent-2-en-1-one Dithioacetals and Dienophilesh
J. Chem. Soc., Chem.
Commun., 1676-1677 (1993).
Masakazu Ohkita, Osamu Nishizawa, Takashi
Tsuji, and Shinya Nishida
- gStructure-Activity Relationship of Glycinoeclepin Ah
Chem. Lett.,
2103-2104 (1992).
Akio Murai, Masakazu Ohkita, Teruki Honma, Kazuhiro Hoshi,
Norihiko Tanimoto, Satoko Araki, and Akio Fukuzawa
- gReaction of Cyclopent-2-en-1-one Ethylene Acetal with Dienophiles via its
Ring-Opened Enol Ether Form. Single Step Synthesis of Norbornan-2-one Ethylene
Acetalsh
J. Chem. Soc., Chem. Commun., 37-38 (1991).
Takashi Tsuji,
Masakazu Ohkita, and Shinya Nishida
- gπ-Facial Selectivity in Diels-AlderReactions of [4.3.2]Propella-2,4,8,10-tetraen-7-one
and Its Derivatives. Synthesis of 2,5-Etheno[4.3.2]propella-3,8,10-trien-7-onesh
J. Org. Chem.,
56, 997-1003 (1991).
Takashi Tsuji, Masakazu Ohkita, and Shinya
Nishida
- gSynthesis and Photochemical Reaction of
[4.3.2]Propella-2,4,8,10-tetraen-7-oneh
J. Org. Chem., 55,
1506-1513 (1990).
Masakazu Ohkita, Takashi Tsuji, Masayuki Suzuki, Masashi
Murakami, and Shinya Nishida
- g3,4-Benzotropone: Generation, Spectroscopic Characterization, and
Reactionsh
J. Chem. Soc., Chem. Commun., 924-926 (1989).
Masakazu
Ohkita, Takashi Tsuji, and Shinya Nishida
µ‘ÒEˆË—Šu‰‰
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- ˆË—Šu‰‰ gDewar Benzene Approach to Highly Strained Paracyclophanes and
Macrocyclesh
Masakazu Ohkita
Seminar at Institute for Nanotechnology, October 2007, Karlsruhe, Germany
- µ‘Òu‰‰ uDewarƒxƒ“ƒ[ƒ“‚ðŠˆ—p‚µ‚½ƒVƒNƒƒtƒ@ƒ“‚¨‚æ‚у}ƒNƒƒTƒCƒNƒ‹‡¬v
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CIF4 Satellite Symposium on Device Physics
of Organic Semiconductor Devices, December 2003, Tomakomai
- µ‘Òu‰‰ gDevelopment of Novel π-Electron Systems with Unique Structures
and Functionsh
Masakazu Ohkita
4th Chitose International Forum
(CIF4) on Photonics Science & Technology, December 2003, Chitose
- ˆË—Šu‰‰ gSynthesis and Characterization of [46]Paracyclophanedodecayne and [48]Paracyclophanehexadecayne Derivativesh
Masakazu Ohkita and
Takashi Tsuji
International Symposium on Novel Carbon-Rich Organic Materials, September 2003, Suita
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- ˆË—Šu‰‰ gProgrammed Helical Self-Organization of Alternating Pyridine–Pyrimidine
Oligomersh
Masakazu Ohkita
Conference de la Chimie
Supramoleculaire, December 1998, Strasbourg, France
- ˆË—Šu‰‰ gGeneration, Spectroscopic Characterization, and Reactions of
[1.1]Paracyclophanesh
Masakazu Ohkita
Conference de la Chimie
Supramoleculaire, November 1997, Strasbourg, France
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