Soft Enolization of 3-Substituted Cycloalkanones Exhibits Significantly Improved Regiocontrol vs Hard Enolization Conditions
作者:Natalie C. Dwulet、Vincenzo Ramella、Christopher D. Vanderwal
DOI:10.1021/acs.orglett.1c03844
日期:2021.12.17
markedly better than the typically applied hard enolization protocols for regioselective enoxysilane formation from unsymmetrical 3-substituted cycloalkanones. Five-, six-, and seven-membered cycloalkanones each with 3-methyl, 3-isopropyl, or 3-phenyl substituents were investigated, and in all but one case, regioselectivities were ≥11:1 for enolization away from the substituent. These results are complementary
研究表明,从不对称 3-取代环烷酮形成区域选择性烯氧基硅烷时,软烯醇化条件明显优于通常应用的硬烯醇化方案。研究了各自带有 3-甲基、3-异丙基或 3-苯基取代基的五元、六元和七元环烷酮,除了一种情况外,在所有情况下,远离取代基的烯醇化的区域选择性≥11:1。这些结果与由环烯酮缀合物加成/烯醇化物硅烷化衍生的区域特异性烯氧基硅烷形成是互补的。