Room Temperature Coupling of Aryldiazoacetates with Boronic Acids Enhanced by Blue Light Irradiation
作者:Amanda F. Silva、Marco A. S. Afonso、Rodrigo A. Cormanich、Igor D. Jurberg
DOI:10.1002/chem.201905812
日期:2020.5.4
visible-light-promoted photochemical protocol is reported for the coupling of aryldiazoacetates with boronic acids. This photochemicalreaction shows great enhancement compared to the same protocol performed in the absence of light. Except for a few cases, the room temperature coupling in the dark (thermal process) generally does not work. When it does, it is likely to also involve free carbenes as key intermediates
Synthesis of sterically hindered esters via titanium catalyzed transesterification
作者:Pavel Krasik
DOI:10.1016/s0040-4039(98)00790-4
日期:1998.6
Titanium (IV) ethoxide was used as a catalyst in transesterification reactions to synthesize esters of sterically hindered alcohols in good to high yields.