- Preparation of π-conjugated polymers consisting of 1-aminopyrrole and 4-amino-1,2,4-triazole units
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π-Conjugated polymers based on 1-aminopyrrole and 4-amino-1,2,4-triazole were prepared. Pd-catalyzed organometallic polycondensation gave poly(arylene-ethynylene) (PAE)-type π-conjugated polymers consisting of BOC-protected 4-amino-1,2,4-triazole (Taz(BOC)) units (BOC= t-butoxycarbonyl). The number average molecular weights (Mn) were determined to be 5200-19,200 using GPC. An alternating copolymer of Taz(BOC) and bithiophene (Th-Th) units, P(Taz(BOC)-Th-Th)n-Pd, with an Mn of 10,800 was also prepared by Pd-catalyzed organometallic polycondensation. (Taz(BOC)-Th-Th)n-Pd showed a UV-Vis absorption peak at λmax = 425 nm, which is reasonable for a re-conjugated five-membered ring polymer with a coplanar structure. The deprotection of the BOC group of the polymers proceeded at 200 °C; this BOC-deprotection was investigated using a model compound. The optical and electrochemical properties of the re-conjugated polymers are reported.
- Koie, Syusaku,Tanaka, Gentaro,Fukumoto, Hiroki,Koizumi, Take-Aki,Yamamoto, Takakazu
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- High-throughput synthesis of symmetrically 3,5-disubstituted 4-amino-1,2,4-triazoles from aldehydes using microwave
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Symmetrically 3,5-substituted 4-amino-1,2,4-triazoles are quickly prepared from aromatic aldehydes via nitriles by two-step reactions without any separation under microwave irradiation for each several minutes.
- Koshima, Hideko,Hamada, Mitsuo,Tani, Makiko,Iwasaki, Shunsuke,Sato, Fumika
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p. 2145 - 2148
(2007/10/03)
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- A facile and solvent-free synthesis of 3,5 -disubstituted-4-amino-1,2,4-triazoles by reactions of aromatic nitriles with hydrazine
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A variety of 3, 5-disubstituted-4-amino-1,2,4-triazoles were prepared by reactions of aromatic nitriles with hydrazine monohydrate. The structure of 3,5-diphenyl-4-amino-1,2,4-triazole was established by an X-ray analysis.
- Ikemi, Yukio,Hayashi, Naoto,Kakehi, Akikazu,Matsumoto, Kiyoshi
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p. 439 - 442
(2007/10/03)
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- A simple one step synthesis of new 3,5-disubstituted-4-amino-1,2,4- triazoles
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A number of symmetrically 3,5-disubstituted 4-amino-1,2,4-triazoles have been prepared by the reaction of aromatic nitriles with hydrazine dihydrochloride or sulfate with an excess of hydrazine hydrate in ethylene or diethylene glycol under a nitrogen atm
- Bentiss,Lagrenee,Traisnel,Mernari,Elattari
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p. 149 - 152
(2007/10/03)
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