Zur Regio- und Stereoselektivit�t nucleophiler Thioladditionen an Polyine
摘要:
Nucleophilic thiophenol additions to alpha,omega-diphenyl polyines Ph-(C = C)n-Ph (n = 2-4) (1-3) take a regio- and stereoselective course. The well-defined, crystalline addition products bind the phenylthio group in terminal position of the aliphatic chain, the resulting C,C-double bonds of the mono( 4, 6, 8) and bis-addition products (5, 7, 9) are (Z)-configurated, as unequivocally proved by C-13-n.m.r. analysis.