摘要:
The tandem Michael addition-cyclization of 2-oxo-cycloalkane carbothioic acid anilides 1-3 to benzylidenemalononitrile 4 yielded spiroannulated pyridines 5-7. Reaction of acrylonitrile with 2 and 3 gave 2,2-disubstituted Michael adducts 14, 15, whereas with 1 led to 2,2,5-tri(2-cyanoethyl)-cyclopentanone 11.