Vitamin B<sub>12</sub>‐Photocatalyzed Cyclopropanation of Electron‐Deficient Alkenes Using Dichloromethane as the Methylene Source**
作者:John Hayford G. Teye‐Kau、Mayokun J. Ayodele、Spencer P. Pitre
DOI:10.1002/anie.202316064
日期:2024.1.8
We report a vitamin B12-photocatalyzed strategy for the cyclopropanation of electron-deficient alkenesusing dichloromethane (CH2Cl2) as the methylene source. The reaction has excellent functional group tolerance, is highly chemoselective, and the scope can be extended to other 1,1-dichloroalkanes for the preparation of D2-cyclopropyl and methyl-substituted cyclopropyl adducts, all of which are important