Frustrated Lewis Pair (FLP)-Catalyzed Hydrogenation of Aza-Morita–Baylis–Hillman Adducts and Sequential Organo-FLP Catalysis
作者:Imtiaz Khan、Mattia Manzotti、Graham J. Tizzard、Simon J. Coles、Rebecca L. Melen、Louis C. Morrill
DOI:10.1021/acscatal.7b03077
日期:2017.11.3
Herein we report the metal-free diastereoselective frustratedLewis pair (FLP)-catalyzed hydrogenation of aza-Morita–Baylis–Hillman (aza-MBH) adducts, accessing a diverse range of stereodefined β-amino acid derivatives in excellent isolated yields (28 examples, 89% average yield, up to 90:10 d.r.). Furthermore, sequential organo-FLP catalysis has been developed. An initial organocatalyzed aza-MBH reaction
Efficient synthesis of benzimidazo[1,2-<i>a</i>]pyrimidinone derivatives<i>via</i>catalyst-free reactions of Baylis-Hillman acetates, alcohols, and amines with 2-aminobenzimidazole
Benzimidazo[1,2‐a]pyrimidinone and its derivatives were easily prepared in good to excellent yields via tandem reactions of 2‐aminobenzimidazole with Baylis–Hillmanacetates, alcohols, and amines without the use of catalyst and additive in one‐pot process. The method provided an efficient and facile route to the title fused heterocyclic compounds with different functional groups. J. Heterocyclic Chem