Concise synthesis of yingzhaosu C and epi-yingzhaosu C by peroxyl radical cyclization. Assignment of relative configuration
摘要:
The antimalarial peroxide yingzhaosu C and its diastereoisomer (epi-yingzhaosu C) have been synthesized by means of tandem peroxyl radical cyclization-oxygen entrapment. The relative configuration of yingzhaosu C is assigned as cis (3) on account of NMR data for both diastereoisomers, (2) and (3), and their precursors (8) and (9).
Palladium(II)-Catalyzed Cyclization of Unsaturated Hydroperoxides for the Synthesis of 1,2-Dioxanes
作者:Jason R. Harris、Shelli R. Waetzig、K. A. Woerpel
DOI:10.1021/ol901046z
日期:2009.8.6
The cyclization of gamma,delta-unsaturated tertiary hydroperoxides in the presence of a palladium(II) catalyst afforded 1,2-dioxanes resembling biologically active natural products. A variety of substrates were screened, and synthetic manipulations were accomplished to construct compounds with structural similarity to antimalarial targets.