Synthesis and biocatalytic resolution of a new atropisomeric thiobiphenyl: (2,2′,6,6′-tetramethoxybiphenyl-3,3′-diyl)dimethanethiol
作者:Claudia Sanfilippo、Giovanni Nicolosi、Giovanna Delogu、Davide Fabbri、Maria Antonietta Dettori
DOI:10.1016/j.tetasy.2005.01.028
日期:2005.3
obtained in enantiopure form using lipase catalysed procedures. The esterification reaction of (±)-1 in the presence of vinyl acetate gave in a one-pot reaction (+)-1 and (−)-1 via a lipase assisted dynamic kinetic resolution of epimerizing hemithioacetal intermediates. The alcoholysis of the diacetylthioester, (±)-5, is an alternative strategy for access to the enantiomers of 1 with high enantiomeric excess
外消旋的硫代联苯(±)-1的两种阻转异构体均使用脂肪酶催化方法以对映纯形式获得。(±)-1在乙酸乙烯酯存在下的酯化反应通过脂肪酶辅助的差向异构化半硫缩醛中间体的动态动力学拆分,在一锅反应(+)- 1和(-)- 1中产生。二乙酰基硫酯(±)-5的醇解是获得对映异构体过量1的对映异构体1的替代策略。