Formation stéréocontroˆlée de deux centres chiraux contigus par thio-rearrangement de claisen d'α-hydroxydithioacétals de cétène s-allylés.
作者:Pieire Beslin、Stéphane Perrio
DOI:10.1016/s0040-4020(01)86559-5
日期:1991.8
assignments were confirmed by a syn selective aldol reaction of 4-pentenedithioates with the appropriate aldehydes. A few 13C NMR generalization rules allowing syn and anti configuration determination were also put forth. A transition state model is proposed to explain the observed asymmetricinduction by the external hydroxy group as a result of both steric and stereoelectronic control.