摘要:
Beta-Chloro-alpha-cyano-cinnamonitrile (1) reacts in one step with alpha-oxo-thioles 3 or successively with sodium sulphide and alpha-chlorocarbonyl compounds 4 to form the 5-substituted 4-amino-2-phenyl-thiophene-3-carbonitriles 5. Analogously, the successive reactions of beta-chloro cinnamonitrile 1 with sodium selenide - produced in situ from selene and sodium boronhydride - and alpha-chlorocarbonyl compounds 4 yields the 5-substituted 4-amino-2-phenyl-selenophene-3-carbonitriles 6.