Výsledky vyhledávání - "Akiko Nakahashi"

Synthesis and Characterization of Stereoisomers of 1,4-Dihydro-1,4-diarsinines

Autor: Yoshiki Chujo, Akiko Nakahashi, Kensuke Naka, Yasuhiro Morisaki, Manabu Arita

Publikováno v: Organometallics. 28:6109-6113

Novel 1,4-diarsa-2,5-cyclohexadiene, i.e., 1,4-dihydro-1,4-dimethyl-2,3,5,6-tetrakis(tert-butoxycarbonyl)-1,4-diarsinine, was synthesized by radical reaction of pentamethylcyclopentaarsine (cyclo-(MeAs)5) and di-tert-butyl acetylenedicarboxylate. Two

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bdf9e469f49271b9756550a92261bc67
https://doi.org/10.1021/om900727c

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Effects of Diphenyl Dichalcogenides on the Radical Polymerization of Diethynyl Disulfide Derivative

Autor: Eisuke Miyoshi, Yoshiki Chujo, Akiko Nakahashi, Kensuke Naka

Publikováno v: JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS. 19(1):55-66

Radical reaction of bis(4-prop-2-ynyloxyphenyl) disulfide (1) with 2,2′-azobis(isobutyronitrile) as an initiator provided a polymer with dithioalkene units (2). The 1H and 13C NMR spectra of 2 showed that 2 had mainly E-form dithioalkene structure.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::536697ec6db7e9a41690140c083038ad
http://hdl.handle.net/2433/109326

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1,4-Dihydro-1,4-diarsinine: Facile Synthesis via Nonvolatile Arsenic Intermediates by Radical Reactions

Autor: Yoshiki Chujo, Kensuke Naka, Akiko Nakahashi

Publikováno v: Organometallics. 26:1827-1830

Novel cyclic organodiarsenic compounds, 1,4-dihydro-1,4-diarsinines, were synthesized by radical reactions of pentamethylcyclopentaarsine (1) and acetylenic compounds. The radical reactions of 1 and acetylenic compounds such as dimethyl acetylenedica

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b36a4bf8f3945f0ace76de9670e87de9
https://doi.org/10.1021/om070080g

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Synthesis of sulfur-containing hyperbranched polymers by the bisthiolation polymerization of diethynyl disulfide derivatives

Autor: Yoshiki Chujo, Masaki Fujita, Tomokazu Umeyama, Akiko Nakahashi, Kensuke Naka, Eisuke Miyoshi

Publikováno v: JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY. 45(16):3580-3587

The reaction of phenyl propynyl ether and diphenyl disulfide in the presence of 1 mol % tetrakis(triphenylphosphine)palladium as a model reaction of the polymerization of bis(4-prop-2-ynyloxyphenyl) disulfide (1a) gave a Z-substituted dithioalkene. N

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0526a52a936fc7bc98f4aa968c8064ed
http://hdl.handle.net/2433/67399

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Synthesis of poly(vinylene-phosphine)s: Ring-collapsed radical alternating copolymerization of methyl-substituted cyclooligophosphine with acetylenic compounds

Autor: and Akiko Nakahashi, Yoshiki Chujo, Tomokazu Umeyama, Kensuke Naka

Publikováno v: MACROMOLECULES. 40(14):4854-4858

A conjugated polymer containing a phosphorus atom in the main chain, poly(vinylene−phosphine), was synthesized by ring-collapsed radical alternating copolymerization (RCRAC) of a cyclooligophosphine and phenylacetylene (1a). Under a nitrogen atmosp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5bb2d952d0ac9c5ecda09181ff766ce1
http://hdl.handle.net/2433/67401

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Periodic terpolymerization of cyclooligoarsine, cyclooligostibine, and acetylenic compound

Autor: Kensuke Naka, and Akiko Nakahashi, Yoshiki Chujo

Publikováno v: MACROMOLECULES. 40(5):1372-1376

The ring-collapsed radical terpolymerization of pentamethylcyclopentaarsine (1a), hexaphenylcyclohexastibine (2), and dimethyl acetylenedicarboxylate (3) provided a periodic terpolymer containing b...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0ed3f2342b00a6ff6a683370c829fa86
http://hdl.handle.net/2433/67654

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Ring-Collapsed Radical Alternating Copolymerization of Phenyl-Substituted Cyclooligostibine and Acetylenic Compounds

Autor: Yoshiki Chujo, Kensuke Naka, and Akiko Nakahashi

Publikováno v: Macromolecules. 39:8257-8262

We studied ring-collapsed radical alternating copolymerization (RCRAC) of hexaphenylcyclohexastibine (cyclo-(Phsb) 6 ) and several acetylenic compounds in the presence of a catalytic amount of 2,2'-azobis(isobutyronitrile) (AIBN) in tetrahydrofuran a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::56ce3154461042e583466caf855cc580
https://doi.org/10.1021/ma061220l

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Synthesis and Properties of Cross-Linked Poly(vinylene-arsine)

Autor: Yoshiki Chujo, Tomokazu Umeyama, Mia D. Bravo, Akiko Nakahashi, Kensuke Naka

Publikováno v: Polymer Bulletin. 52:191-199

Cross-linked poly(vinylene-arsine)s (4) were synthesized by a free-radical terpolymerization of phenylacetylene (2), hexaphenylcyclohexaarsine (l), and p- or m-diethynylbenzene (p- or m-3) at different compositions in the presence of a catalytic amou

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a16a93dc16f1a2d0ca9a0ecab6bf27a6
https://doi.org/10.1007/s00289-004-0277-x

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Radical copolymerization of acetylenic compounds with phenyl-substituted cyclooligoarsine: Substituent effect and optical properties

Autor: Tomokazu Umeyama, Yoshiki Chujo, and Akiko Nakahashi, Kensuke Naka

Publikováno v: MACROMOLECULES. 37(4):1271-1275

The radical reaction between hexaphenylcyclohexaarsine (1) and acetylenic compounds with various substituents (2a−d) using a catalytic amount of AIBN provided the corresponding alternating copolymer, poly(vinylene−arsine). The copolymers obtained

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1801703298bc9bc094a943232e03a5bc
http://hdl.handle.net/2433/8081

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