Ruthenium-Porphyrin-Catalyzed Diastereoselective Intramolecular Alkyl Carbene Insertion into CH Bonds of Alkyl Diazomethanes Generated In Situ from<i>N</i>-Tosylhydrazones
作者:Annapureddy Rajasekar Reddy、Cong-Ying Zhou、Zhen Guo、Jinhu Wei、Chi-Ming Che
DOI:10.1002/anie.201408102
日期:2014.12.15
slow addition with a syringe pump. From a synthetic point of view, the CH insertion of N‐tosylhydrazones can be viewed as reductive coupling between a CO bond and a CH bond to form a new CC bond, since N‐tosylhydrazones can be readily prepared from carbonyl compounds. This reaction was successfully applied in a concise synthesis of (±)‐pseudoheliotridane.
用钌-卟啉催化剂,从原位生成的烷基重氮甲烷Ñ -tosylhydrazones有效后行分子内C(SP 3) H成烷基碳烯,得到取代的四氢呋喃和吡咯烷在多达99%的产率,并用高达99插入:1顺式选择性。该反应显示出对许多功能的良好耐受性,并且该过程简单,无需使用注射泵缓慢添加。从一个合成点中,C h的插入Ñ -tosylhydrazones可以被看作是一个CO键和C之间还原偶联 H键以形成一个新的C C键,由于Ñ甲苯磺酰hydr可以很容易地由羰基化合物制备。该反应已成功地用于简明的(±)-伪三碘三环烷的合成中。