Triorganotin hydride reduction of 6β-isothiocyanatopenicillanates: a radical-induced sulphur–C(2) bond cleavage
作者:D. Ivor John、Nicholas D. Tyrrell、Eric J. Thomas
DOI:10.1039/c39810000901
日期:——
Triorganotinhydridereduction of methyl 6β-isothiocyanatopenicillanate is accompanied by intra-molecular radical capture and cleavage of the sulphur–C(2) bond to give thiazolines (9) and (10); a similar mechanism is proposed for the formation of thiazoline (3), a minor product of tri-n-butyltin hydridereduction of benzyl 6α-(1-hydroxyl-1-methylethyl)-6β-isocyanopenicillanate (1; R2= Me2COH).
三有机锡甲基6的氢化物还原β -isothiocyanatopenicillanate伴有硫-C(的分子内自由基捕获和切割2)键,得到噻唑啉(9)和(10); 类似的机制,提出了噻唑啉的形成(3),三-正丁基锡氢化物还原苄6α-(1-羟基-1-甲基乙基)-6的次要产物β -isocyanopenicillanate(1 ; R 2 =我2 COH)。