Conjugate addition of lithium ester enolates to 1-chlorovinyl p-tolyl sulfoxides: a novel synthesis of functionalized esters and lactones having a tertiary or a quaternary carbon at the β-position
作者:Tsuyoshi Satoh、Shimpei Sugiyama、Yuhki Kamide、Hiroyuki Ota
DOI:10.1016/s0040-4020(03)00636-7
日期:2003.6
Addition of the lithium ester enolates to 1-chlorovinyl p-tolyl sulfoxides, which were synthesized from chloromethyl p-tolyl sulfoxide and ketones or aldehydes, gave esters having a tertiary or a quaternary carbon at the 3-position, and chlorine and sulfinyl groups at the 4-position in high to quantitative yields. The adducts were converted to various esters having methyl, formyl, and hydroxycarbonyl
的锂酯烯醇化物加成到1-氯乙烯基p -甲苯基亚砜,这是从氯合成p -甲苯基砜和酮或醛,得到具有叔或在3-位置上的季碳,并在氯和亚磺酰基酯高产量到定量产量的4位。加合物被转化为在3-位具有甲基,甲酰基和羟羰基的各种酯。从加合物中以良好的总收率实现了一种新的合成γ-内酯的方法,包括螺型γ-内酯和α-亚甲基γ-内酯。还讨论了该方法的范围和局限性以及反应机理。