Synthesis of 3- and 5-amino-5-(3)-(pyrrol-2-yl)isoxazoles
作者:Lyubov' N. Sobenina、Vladislav N. Drichkov、Al'bina I. Mikhaleva、Olga V. Petrova、Igor A. Ushakov、Boris A. Trofimov
DOI:10.1016/j.tet.2005.03.031
日期:2005.5
5-Amino-3-(pyrrol-2-yl)isoxazoles were selectively prepared by the reaction of 2-(2,2-dicyano-1-ethylthioethenyl)pyrroles with hydroxylamine in methanol. Under analogous conditions, 2-(2-carbamoyl-2-cyano-1-ethylthioethenyl) pyrroles with hydroxylamine gave 5-aminoisoxazoles and their structural isomers, 3-aminoisoxazoles (3–5% yield). The latter were selectively prepared by reacting 2-(2-carbamoy
Facile coupling of 2-(1-ethylthioethenyl)pyrroles with amines: A route to 2-(1-aminoethenyl)pyrroles and 1-amino-3-iminopyrrolizines
作者:Boris A. Trofimov、Lyubov' N. Sobenina、Al'bina I. Mikhaleva、Ol'Ga V. Petrova、Vladislav N. Drichkov、Igor A. Ushakov、Ol'Ga A. Tarasova、Darya-Suren D. Toryashinova、Yuriy Yu. Rusakov、Leonid B. Krivdin
DOI:10.1002/jhet.5570440301
日期:2007.5
2-(2-Cyano-1-ethylthioethenyl)pyrroles are readily coupled (50–55°) with primary and secondary amines at the position 1 of the ethenyl moiety to eliminate ethanethiol and afford 2-(1-amino-2-cyanoethenyl)pyrroles and/or their cyclic isomers - functionalized 1-amino-3-iminopyrrolizines in good to high yields.
Pyrrole-2-dithiocarboxylates: Synthesis of 2-(1-Alkylthio-2-cyanoethenyl)pyrroles
作者:Lubov N. Sobenina、Albina I. Mikhaleva、Maria P. Sergeeva、Olga V. Petrova、Tamara N. Aksamentova、Olga B. Kozyreva、Darya-S.D. Toryashinova、Boris A. Trofimov
DOI:10.1016/0040-4020(95)00149-3
日期:1995.4
2-(1-Alkylthio-2-cyanoethenyl)pyrroles were synthesized in good to high yields by reaction of pyrrole-2-dithiocarboxylates with active methylene nitriles in a KOH-DMSO medium. The condensation of 4,5,6,7-tetrahydroindole with cyanoacetate also leads to 1-ethylthio-2-cyano-4,5,6,7-tetrahydrocyclohexa-[c]-3H-pyrrolizin-3-one in 61% yield. The effect of substituent on the reaction course has been studied