Intramolecular Hydroamination of Difluoropropargyl Amides: Regioselective Synthesis of Fluorinated β- and γ-Lactams
摘要:
Functionalized gem-difluoro beta- and gamma-lactams were synthesized through a novel intramolecular hydroamination reaction of difluoropropargyl amides.beta-Lactams were obtained via a Baldwin disfavored 4-exo-digonal cyclization using palladium acetate as the catalyst, whereas gamma-lactams were produced under basic conditions. Acid hydration of gamma-lactams produced ketoamides or hemiaminals selectively.
Intramolecular Hydroamination of Difluoropropargyl Amides: Regioselective Synthesis of Fluorinated β- and γ-Lactams
摘要:
Functionalized gem-difluoro beta- and gamma-lactams were synthesized through a novel intramolecular hydroamination reaction of difluoropropargyl amides.beta-Lactams were obtained via a Baldwin disfavored 4-exo-digonal cyclization using palladium acetate as the catalyst, whereas gamma-lactams were produced under basic conditions. Acid hydration of gamma-lactams produced ketoamides or hemiaminals selectively.
Intramolecular Hydroamination of Difluoropropargyl Amides: Regioselective Synthesis of Fluorinated β- and γ-Lactams
作者:Santos Fustero、Begoña Fernández、Paula Bello、Carlos del Pozo、Satoru Arimitsu、Gerald B. Hammond
DOI:10.1021/ol701811z
日期:2007.10.1
Functionalized gem-difluoro beta- and gamma-lactams were synthesized through a novel intramolecular hydroamination reaction of difluoropropargyl amides.beta-Lactams were obtained via a Baldwin disfavored 4-exo-digonal cyclization using palladium acetate as the catalyst, whereas gamma-lactams were produced under basic conditions. Acid hydration of gamma-lactams produced ketoamides or hemiaminals selectively.