Generation of the<i>α</i>-Sulfinyl Carbenoid from<i>α</i>-Chloro Sulfoxides: A New Method for One-Carbon Homologation of Ketones to<i>α</i>-Sulfinyl Ketones
作者:Tsuyoshi Satoh、Yasumasa Hayashi、Yasuhiro Mizu、Koji Yamakawa
DOI:10.1246/bcsj.67.1412
日期:1994.5
carbenoids were successfully used in a new method for homologation of ketones to α-sulfinyl ketones. Treatment of the carbanion of chloromethyl phenyl sulfoxide with ketones gave the adducts, α-chloro β-hydroxy sulfoxides, in nearly quantitative yields. The adducts were treated with excess lithium diisopropylamide to give one-carbon homologated α-sulfinyl ketones via α-sulfinyl β-oxido carbenoids in moderate
用碱处理 1-氯烷基苯基亚砜得到类卡宾而不是游离卡宾。卡宾类化合物成功地用于将酮类同系为 α-亚磺酰基酮的新方法。用酮处理氯甲基苯基亚砜的碳负离子得到加合物,α-氯 β-羟基亚砜,产量几乎是定量的。加合物用过量的二异丙基氨基锂处理,通过 α-亚磺酰基 β-氧化类卡宾以中等至良好的产率得到一碳同系的 α-亚磺酰基酮。发现使用相应的砜不会发生这种类型的反应。