was established to be a crucial parameter for this transformation. When combined with DoM and traditional Pd-catalyzed Suzuki-Miyaura strategies, the methodology offers concise routes to uniquely substituted molecules, avoiding the need for protection/deprotection of the phenol and the use of strongly nucleophilic cross-coupling partners.
Directed ortho Metalation Reactions of Aryl O-Carbamates; A Regiospecific Synthesis of 2,2-Disubstituted 2H-1-Benzopyrans
作者:Brian A. Chauder、Alexey V. Kalinin、Victor Snieckus
DOI:10.1055/s-2001-9747
日期:——
A one-pot regiocontrolled synthesis of 2,2-disubstituted 2H-1-benzopyrans 5 from aryl O-carbamates 4 using the directed ortho metalation reaction is described and constitutes an advantageous complement to classical routes for this class of heterocycles.