(4α,8β,13β,16β)-13-methyl-16,18-diol-17-norkaurane was synthesized by esterification and reduction of isosteviol, respectively. The structure of the title compound was established by spectral analysis and X-ray diffraction studies. The compound crystallizes in the orthorhombic space group P212121 with unit cell parameters: a = 7.3705 (14) Å, b = 13.508 (3) Å, c = 20.139 (4) Å, V = 2005.1 (7) Å3, Z = 4. The conformation of rings A and B is chair, whereas the conformation of ring C is unsymmetrical distorted chair. The stereochemistry of the A/B and B/C ring junctions is trans, while the five-membered ring D adopts an envelope conformation. (4α,8β,13β,16β)-13-methyl-16,18-diol-17-norkaurane was synthesized by esterification and reduction of isosteviol, respectively. The structure of the title compound was established by spectral analysis and X-ray diffraction studies.
通过酯化和还原异石杉醇,分别合成了 (4α,8β,13β,16β)-13-甲基-16,18
-二醇-17-去甲
金兰。通过光谱分析和 X 射线衍射研究确定了标题化合物的结构。该化合物在正交空间群 P212121 中结晶,单胞参数为:a = 7.3705 (14) Å, b = 13.508 (3) Å, c = 20.环 A 和环 B 的构象为椅状,而环 C 的构象为不对称扭曲椅状。A/B 环和 B/C 环连接处的立体
化学结构为反式,而五元环 D 则采用包络构象。(4α,8β,13β,16β)-13-甲基-16,18
-二醇-17-去甲牛磺烷分别通过
异十三醇的酯化和还原反应合成。通过光谱分析和 X 射线衍射研究确定了标题化合物的结构。