Synthesis of pyrinodemins A and B. Assignment of the double bond position of pyrinodemin A
作者:Barry B Snider、Bo Shi
DOI:10.1016/s0040-4039(01)00003-x
日期:2001.2
Condensation of aldehyde 3a with hydroxylamine 4b afforded nitrone 2, which underwent an intramolecular cycloaddition to give Ib, the proposed structure of pyrinodemin A. A similar condensation of aldehyde 3a and hydroxylamine 4a provided pyrinodemin A (1a), which has the double bond one carbon further away from the isoxazolidine. An analogous sequence gave pyrinodemin B (21). (C) 2001 Elsevier Science Ltd. All rights reserved.