Steroidal seven-membered A-ring epoxy lactones by oxidation of the corresponding Δ4-3-ketosteroids
摘要:
Treatment of Delta(4)-3-ketosteroids with m-chloroperbenzoic acid at O degrees C produced the corresponding steroidal seven-membered A-ring epoxy lactones. The adopted procedure allowed for efficient recovery and separation of the products with definite stereochemistry. (c) 2005 Elsevier Inc. All rights reserved.