Carbon−Sulfur Bond Formation via Iridium-Catalyzed Asymmetric Allylation of Aliphatic Thiols
摘要:
An iridium-catalyzed regio- and enatioselective allylation with aliphatic thiols as the nucleophile in dichloromethane has been accomplished; and the branch products were obtained in 34-80% yields with up to 94/6 b/l and 98% ee.
Enantioselective Allylic Thioetherification: The Effect of Phosphoric Acid Diester on Iridium‐Catalyzed Enantioconvergent Transformations
作者:Markus Roggen、Erick M. Carreira
DOI:10.1002/anie.201202092
日期:2012.8.20
You'll take the high road and I'll take the low road: Enantioenriched allylic thioethers have been synthesized from chiral racemic allylic alcohols. The combination of an Ir–(P,alkene) complex and dibutyl phosphoricacid are required to attain high selectivities. Mechanistic studies uncover an enantioconvergenttransformation in which substrate enantiomers react along different pathways to give the