文献类型：期刊文献

英文题名：Synthesis and crystal structure of maleopimaric acid

作者：Rao, Xiaoping[1] Song, Zhanqian[1] Yao, Xujie[1] Han, Chunrui[1] Shang, Shibin[1]

第一作者：饶小平

通信作者：Song, ZQ[1]

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

年份：2008

卷号：22

期号：10

起止页码：854-859

外文期刊名：NATURAL PRODUCT RESEARCH

收录：;Scopus(收录号：2-s2.0-47949125189);WOS:【SCI-EXPANDED(收录号:WOS:000257581600005)】；

基金：We thank for the Chinese government ‘‘the tenth five years of tackle key problem’’ foundation for the financial support.

语种：英文

外文关键词：maleopimaric acid; Diels Alder; single crystal; Trans ring junction; hydrogen bond

摘要：The title compound maleopimaric acid was synthesized by a Diels-Alder reaction between maleic anhydride and Pinus elliottii engelm oleoresin at room temperature and it was characterized by single crystal X-ray diffraction. The white crystals crystallized in the orthorhombic system, space group P212121 with cell dimensions: a = 7.6960 (15)angstrom , b = 11.851 (2) angstrom, c = 24.577 (5) angstrom, alpha = 90 degrees, beta = 90 degrees, gamma = 90 degrees, V = 2241.6(8) angstrom(3), and R-1 = 0.0716, wR(2) = 0.1975. The two fused and unbridged cyclohexane rings form a trans ring junction with chair conformation with two methyl groups in axis positions, the anhydride ring is planar. Crystal water existed in the molecular and stabilized the structure through intermolecular hydrogen bonds.