Highly Stereoselective Asymmetric Pummerer Reactions That Incorporate Intermolecular and Intramolecular Nonbonded S···O Interactions
作者:Yoshimitsu Nagao、Satoshi Miyamoto、Motoyuki Miyamoto、Hiroe Takeshige、Kazuhiko Hayashi、Shigeki Sano、Motoo Shiro、Kentaro Yamaguchi、Yoshihisa Sei
DOI:10.1021/ja056649r
日期:2006.8.1
the intramolecular nonbonded S...O close contacts were recognized. Analyses of several sulfoxide complexes including rac-11 with N,N-dimethylacetamide (DMAC) or N-methyl-2-pyrrolidone (NMP) in a MeOH solution utilizing cold-spray ionization mass spectrometry provided, for the first time, direct information for intermolecular nonbonded S...O interactions between sulfoxides and amide (or lactam) in a
新的手性亚砜 (R(S),S)-3、(S(S),S)-3、(R(S),S)-4 和 (S(S),S)-4 和已知的手性亚砜合成了亚砜 (R(S))-5、(R(S))-6 和 (R(S))-7,以及新的亚砜 (R(S),S)-3 和 ( R(S),S)-4 通过 X 射线晶体学分析确定。在它们的晶体结构中,可以识别出分子内非键合 S...O 紧密接触。使用冷喷雾电离质谱法在 MeOH 溶液中分析了几种亚砜配合物,包括 rac-11 与 N,N-二甲基乙酰胺 (DMAC) 或 N-甲基-2-吡咯烷酮 (NMP),首次提供了直接信息溶液中亚砜和酰胺(或内酰胺)之间的分子间非键合 S...O 相互作用。通过处理几种手性亚砜(R(S),S)-3,(S(S),S)-3,进行基于分子间和分子内非键合S ... O相互作用概念的高度非对映选择性和对映选择性Pummerer反应, (R(S), S)-4, (S(S)