The structure of laurenene, a new diterpene from the essential oil of Dacrydium cupressinum. Part 2. Crystal structure
作者:R. Edward Corbett、Claire M. Couldwell、Denis R. Lauren、Rex T. Weavers
DOI:10.1039/p19790001791
日期:——
The structure and absolute configuration of Laurenene (1), a compound possessing a new diterpene skeleton, have been determined by X-ray analysis of the bromo-derivative (2). Crystals are monoclinic, space group P21, with a= 7.318(1), b= 13.824(3), c= 9.731 (1)Å, β= 115.493(5)°, and Z= 2. The structure was solved by the heavy-atom method and the atomic parameters refined by block-diagonal least-squares
拥有新的双萜骨架的化合物Laurenene(1)的结构和绝对构型已通过溴衍生物(2)的X射线分析确定。晶体是单斜晶体,空间群P 2 1,a = 7.318(1),b = 13.824(3),c = 9.731(1)Å,β= 115.493(5)°,Z =2。解决了结构由重原子法和原子参数由块对角最小二乘计算来精制ř 0.043在具有1个208独立反射˚F 2 2σ(˚F 2)从衍射仪测量。绝对构型是由反常色散效应建立的。环庚烷环采用扭转椅构象,并且双键遭受大量的空间拥挤。