Synthesis of N-containing drimane sesquiterpenoids from 11-dihomodriman-8α-ol-12-one
作者:K. I. Kuchkova、A. N. Aryku、P. F. Vlad、K. Deleanu、A. Nikolescu
DOI:10.1007/s10600-010-9671-9
日期:2010.9
Beckmann reaction products of 11-dihomodriman-8α-ol-12-one oxime with Ac2O in pyridine, 86% H3PO4, p-TsCl in pyridine, and PCl5 in ether were investigated. It has been found that the major product from treatment of the oxime with Ac2O is the oxime acetate. Reaction of the oxime with 86% H3PO4 gave (1S,2S,4aS,8aS)-2,5,5,8a-tetramethyldecahydro-1H-naphtho[1, 2][5, 6]-3-methyl-4,5-dihydro[1, 2, 6]oxazine; with p-TsCl, (1S,2S,4aS,8aS)-2,5,5,8a-tetramethyldecahydro-1H-naphtho[1, 2][5, 6]-2-methyl-4,5dihydro[1, 3, 6]oxazine; with PCl5, a mixture of products containing 11-acetylamino- and 11-methylaminooxodrimenes that were isomeric at the double bond, norambreinolide, and a 1,3,6-oxazine.
研究了 11-二氢
嘧啶-8α-醇-12-酮
肟与
吡啶中的 Ac2O、86% H3PO4、
吡啶中的 p-TsCl 和
乙醚中的 PCl5 的贝克曼反应产物。研究发现,
肟与 Ac2O 反应的主要产物是
肟醋酸酯。
肟与 86% H3PO4 反应得到 (1S,2S,4aS,8aS)-2,5,5,8a-四甲基十氢-1H-
萘并[1,2][5,6]-3-甲基-4,5-二氢[1,2,6]恶嗪;用 p-TsCl,(1S,2S,4aS,8aS)-2,5,5,8a-四甲基十氢-1H-
萘并[1, 2][5,6]-2-甲基-4,5-二氢[1, 3, 6]恶嗪;用 PCl5 生成含有 11-乙酰
氨基和 11-甲基
氨基氧
二苯甲酮的混合物(这两种物质在双键处为异构体)、去甲斑蝥内酯和一种 1,3,6-恶嗪。