The Reactions of Triphenylphosphine Alkylenes with 3(2-Thienyl)acrylonitriles
摘要:
Ethyl 3-(2-thienyl)acrylocyanoacetate (1b) reacts with ester ylide phosphoranes 2a,b in toluene, containing triethylamine, affording the Michael addition products 7a,b and the cyclopropanes 6a,b and 8a,b. The reaction of 1b with keto ylide 2c in ethyl acetate containing benzoic acid in addition to the ylide 76 the pyran 12 was obtained On the other hand, (cyanomethyl)triphenylphosphonium chloride (13) reacts, under the phase-transfer catalysis conditions, with 1b to give the cyclopropane derivative 15 whereas with la, the new ylide 16 along with the propene derivative 17 were obtained.
The Reactions of Triphenylphosphine Alkylenes with 3(2-Thienyl)acrylonitriles
摘要:
Ethyl 3-(2-thienyl)acrylocyanoacetate (1b) reacts with ester ylide phosphoranes 2a,b in toluene, containing triethylamine, affording the Michael addition products 7a,b and the cyclopropanes 6a,b and 8a,b. The reaction of 1b with keto ylide 2c in ethyl acetate containing benzoic acid in addition to the ylide 76 the pyran 12 was obtained On the other hand, (cyanomethyl)triphenylphosphonium chloride (13) reacts, under the phase-transfer catalysis conditions, with 1b to give the cyclopropane derivative 15 whereas with la, the new ylide 16 along with the propene derivative 17 were obtained.