A novel synthesis of carboxylic acid derivatives having a quaternary carbon at 3-position and functional groups at 4-position from 1-chlorovinyl p-tolyl sulfoxides and acetic acid esters
作者:Tsuyoshi Satoh、Shimpei Sugiyama、Hiroyuki Ota
DOI:10.1016/s0040-4039(02)00414-8
日期:2002.4
lithium enolate of acetic acid esters to 1-chlorovinyl p-tolyl sulfoxides, which were derived from ketones and chloromethyl p-tolyl sulfoxide in three steps in good yields, gave carboxylicacid esters having a quaternary carbon at the 3-position, and chlorine and sulfinyl groups at the 4-position in high yields. Various kinds of functionalized carboxylicacidderivatives, including spiro-lactones,
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