Studies into the Diels–Alder reactions of 5-trimethylsilylthebaine
摘要:
The introduction of a 5-trimethylsilyl group on the least hindered face of the diene thebaine was anticipated to favor attack by dienophiles front the alternate face, but only gave rise to a rearrangement product when treated with 3-butene-2-one at 110degreesC. Reaction with the more reactive benzoquinone at lower temperature gave rise to a very slow reaction from the same face as the silyl group, indicating that a trimethylsilyl group does not sufficiently hinder this face to achieve reaction at the other face. (C) 2004 Elsevier Ltd. All rights reserved.
Synthetic transformations of isoquinoline alkaloids. 1-alkynyl-3,6-dimethoxy-N-methyl-4,5α-epoxy-6,18-endoethenobenzo[i]isomorphinans and their transformations
作者:V. T. Bauman、E. E. Shul’ts、V. V. Kononchuk、I. Yu. Bagryanskaya、M. M. Shakirov、G. A. Tolstikov
DOI:10.1134/s1070428013100175
日期:2013.10
18-endo-ethenodihydrothebainehydroquinones with trimethylsilylacetylene and subsequent desilylation gave 1-ethynyl-6,18-endo-ethenodihydrothebainehydroquinones. 1-[3-(4-R-Piperazin-1-yl)-propynyl]- and 1-3-[2-(pyridin-3-yl)piperidin-1-yl]propynyl}-6,18-endo-ethenodihydrothebainehydroquinones were synthesized by the Mannich reaction of acetylenic derivatives of dihydrothebainehydroquinone with piperazine
Synthetic transformations of isoquinoline alkaloids. Synthesis of new dihydrothebaine-hydroquinone derivatives
作者:V. T. Bauman、E. E. Shults、M. M. Shakirov、G. A. Tolstikov
DOI:10.1007/s11172-007-0190-1
日期:2007.6
Abstract1-Bromo-and 1-iodo-6,14-endo-ethenodihydrothebaine-hydroquinones were obtained. The Heck reactions of these halides with various olefins were studied.