Aldol condensation reactions of chiral (dienone) tricarbonyliron complexes. 21. Enantioselective synthesis of the dienic polyols streptenols C and D (metabolites from Streptomyces Fimbriatus)
摘要:
The trimethylsilyl enol ether of (3,5-heptadien-2-one) tricarbonyliron 1 undergoes a highly stereoselective cross aldol reaction with TiCl4-coordinated beta-o.methoxybenzyloxypropanal yielding after deprotection the ketodiol complex 9. Direct decomplexation or decomplexation after totally metal induced stereoselective reduction to the triol 10, led to Streptenols C and D. The natural dextrorotatory enantiomers were obtained from the readily available pure (+)-1. (C) 1997 Elsevier Science Ltd.
A new strain of Streptomyces: An anthracycline containing a C-glucoside moiety and a chiral decanol
作者:Alberto Arnone、Rosanna Cardillo、Gianluca Nasini、Orso Vajna de Pava、Sergio Quaroni
DOI:10.1016/0031-9422(88)80777-5
日期:1988.1
Abstract Two new metabolites have been isolated from strain C57 of Streptomyces and their structure determined on the basis of chemical and NMR evidence.