Cyclic Guanidines; III<sup>1</sup>Synthesis of Novel 8,13,15-Triazasteroids and Related Heterocycles
作者:Franz Esser、Karl-Heinz Pook、Alain Carpy
DOI:10.1055/s-1990-26793
日期:——
The Pictet-Spengler reaction is utilized for the generation of 8,13,15-triazasteroids and related multicyclic compounds. The constitution of 7a is elucidated by NMR- and X-ray analysis. A second route to the triazasteroid ring system by Bischler-Napieralski type cyclization is disclosed. Synthetic alternatives as well as the variability in size and nature of rings A, B, C and D of the steroid-like skeletons are demonstrated. Synthesis covers 14 new tetra- and pentacyclic compounds on the basis of 9 novel ring systems.
Pictet-Spengler反应被用于生成8,13,15-三氮甾体及其相关多环化合物。7a的结构通过核磁共振和X射线分析得以阐明。本文揭示了通过Bischler-Napieralski型环化反应构建三氮甾体环系统的第二条途径。本文展示了合成替代方案以及甾体类似骨架中环A、B、C和D的大小与性质的多样性。合成涵盖了基于9种新颖环系统的14个新的四环和五环化合物。