Journal
STEROIDS
Volume 73, Issue 11, Pages 1137-1142Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.steroids.2008.04.016
Keywords
steroidal enamide; formylation; Vilsmeier reaction; pyridosteroid; chloromethyleneiminium salt
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A facile strategy for the preparation of A-ring fused pyridosteroids has been accomplished in high yields by the reaction of Vilsmeier reagent (chloromethyleneiminium salt) with steroidal A-ring enamides (2- and 3-ene) under thermal conditions. The structure of 6'-chloro-5 alpha-cholest [3,2-b]pyridine was determined by X-ray analysis. (c) 2008 Elsevier Inc. All rights reserved.
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