文献类型：期刊文献

英文题名：Dehydroabietic acid

作者：Rao, Xiao-Ping[1] Song, Zhan-Qian[1] Shang, Shi-Bin[1]

第一作者：饶小平

通信作者：Rao, XP[1]|[a0005b2996927fc131f05]饶小平;

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Nanjing 210042, Peoples R China

年份：2009

卷号：65

期号：10

起止页码：O2402-+

外文期刊名：ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS

收录：;Scopus(收录号：2-s2.0-70349769482);WOS:【SCI-EXPANDED(收录号:WOS:000270450400174)】；

基金：This work was supported by the National Natural Science Foundation of China (grant No. 30800871) and the Fundamental Research Foundation of the Central Commonwealth Institute of the Chinese Academy of Forestry (grant No. CAFYBB2008021),

语种：英文

摘要：The title compound [systematic name: (1R,4aS,10aR)-7-isopropyl-1,4a- dimethyl-1,2,3,4,4a, 9,10,10a-octahydrophenanthrene-1-carboxylic acid], C20H28O2, has been isolated from disproportionated rosin which is obtained by isomerizing gum rosin with a Pd-C catalyst.. Two crystallographically independent molecules exist in the asymmetric unit. In each molecule, there are three six-membered rings, which adopt planar, half-chair and chair conformations. The two cyclohexane rings form a trans ring junction with the two methyl groups in axial positions. The crystal structure is stabilized by intermolecular O-H center dot center dot center dot O hydrogen bonds.