Studies Directed toward the Synthesis of Hamigeran B: A Catalytic Oxidative Cyclization
作者:Zhengxin Cai、Michael Harmata
DOI:10.1021/ol102478h
日期:2010.12.17
An approach to the synthesis of hamigeran B is described. Key steps include a Tius-Nazarov cyclization and a palladium-catalyzed oxidative cyclization of an alpha-hydroxyenone.
Benzothiazines in Synthesis. Toward the Synthesis of Pseudopteroxazole
作者:Michael Harmata、Xuechuan Hong、Charles L. Barnes
DOI:10.1021/ol049334+
日期:2004.6.1
was prepared in a straightforward fashion via a completely stereoselective intramolecular Friedel-Crafts alkylation. This compound represents a potential precursor to the antitubercular agent, pseudopteroxazole. Its synthesis proceeded via a completely selective, intramolecular addition of a sulfoximine-stabilized carbanion to an alpha,beta-unsaturated ester, followed by functional group manipulations