Product Control using Substrate Design: Ruthenium-Catalysed Oxidative C−H Olefinations of Cyclic Weinreb Amides
作者:Riki Das、Manmohan Kapur
DOI:10.1002/chem.201603126
日期:2016.11.14
A new class of Weinreb amides has been developed as directing groups for the ruthenium‐catalysed regioselective oxidative C−H olefination. The new Weinreb amides successfully inhibit the N−O bond reductive cleavage usually associated with the cationic ruthenium system, thereby keeping intact the synthetic utility of Weinreb amides. Mechanistic studies reveal interesting aspects of the directing group
Fujiwara-Moritani Reaction of Weinreb Amides using a Ruthenium-Catalyzed C−H Functionalization Reaction
作者:Riki Das、Manmohan Kapur
DOI:10.1002/asia.201500343
日期:2015.7
The ruthenium‐catalyzed Fujiwara–Moritanireaction (oxidative‐Heck reaction) of Weinrebamides is reported herein. The reaction affords exclusively ortho‐C−H olefination products, has excellent substrate scope and tolerates halogen functionalities, which increase the synthetic utility of the method. A variety of activated olefins as well as styrenes can be employed as coupling partners.