Synthesis and Absolute Configuration of the C<sub>12</sub>-Terpenoid Dehydrogeosmin from the Flower Scents of<i>Rebutia marsoneri</i>and<i>Dolichothele sphaerica</i>(Cactaceae); a new approach to bis-angularly substituted<i>trans</i>-decalins
作者:Udo Huber、Wilhelm Boland、Wilfried A. König、Bärbel Gehrcke
DOI:10.1002/hlca.19930760513
日期:1993.8.11
8a-dimethylnaphthalen-4a-ol((+)-1; dehydrogeosmin) is released from flower heads of the two cactaceae Rebutia marsoneri and Dolichothele spharica. The absolute configuration of (+)-1 is identical with that of the known microbial metabolial geosmin (−)-2. The key reactions of the synthesis of 1 are the kinetically controlled transesterification of the primary alcohol 4 using a lipase from Candida cyclindracea and
光学纯(+)-(4 S,4a S,8a S)-1,2,3,4,4a,5,8,8a-八氢-4,8a-二甲基萘-4a-ol((+)- 1从两个仙人掌的Rebutia marsoneri和Dolichothele spharica的头状花序中释放出(dehydrogeosmin)。(+)- 1的绝对构型与已知的微生物代谢土臭素(-)- 2的构型相同。1合成的关键反应是使用来自假丝酵母念珠菌的脂肪酶对伯醇4进行动力学控制的酯交换反应,以及顺式的立体和区域特异性角烷基化萘烷骨架是由具有MeMgBr / Cul的季环氧醇3的路易斯酸辅助开环所形成的。该序列为双角取代的反式十氢化萘类提供了新的机会。