Recyclization of 2,6-Diamino-4-aryl(cyclohexyl)-3,5-dicyano-4H-thio(seleno)pyrans
作者:V. D. Dyachenko、A. N. Chernega、S. G. Garasevich
DOI:10.1007/s11176-005-0475-8
日期:2005.10
Recyclization of 2,6-diamino-4-aryl(cyclohexyl)-3,5-dicyano-4H-thio(seleno)pyrans in the presence of an equimolar amount of an α-bromo carbonyl compound, ethyl iodide, 1,2-dibromoethane, or 3-chlorophenyl isocyanate yields, respectively, 3-aryl(cyclohexyl)-2-[thiazol(selenazol)-2-yl]acrylonitriles, 6-amino-4-phenyl-2-ethylsulfanyl-1,4-dihydropyridine-3,5-dicarbonitrile, 5-amino-7-phenyl-2,3,4,7-tetrahydrothiazolo[3,2-a]pyridine-6,8-dicarbonitrile, or N,N′-bis(3-chlorophenyl)urea.
2,6-二
氨基-4-芳基(环己基)-3,5-二
氰基-4H-
硫(
硒)
吡喃的再环化在等摩尔的α-
溴羰基化合物、乙基
碘、
1,2-二溴乙烷或3-
氯苯异氰酸酯存在下,分别生成3-芳基(环己基)-2-[
噻唑(
硒唑)-2-基]
丙烯腈、6-
氨基-4-苯基-2-乙基
硫醇-1,4-
二氢吡啶-3,5-二
氰基、5-
氨基-7-苯基-2,3,4,7-
四氢噻唑[3,2-a]
吡啶-6,8-二
氰基或N,N′-双(3-
氯苯)
尿素。