Synthetic Study on Gymnomitrol and Related Compounds. I. Preparation and Cyclopropane Ring Opening of 1,2,6-Trimethyltetracyclo(5.3.1.02,6.08,11)undecan-9-one.
作者:Takeshi IMANISHI、Yoshimi HIROKAWA、Masayuki YAMASHITA、Tetsuaki TNAKAKA、Kazuyuki MIYASHITA、Chuzo IWATA
DOI:10.1248/cpb.41.31
日期:——
1, 2, 6-Trimethyltetracyclo[5.3.1.0<2, 6&tg;.0<8, 11>]undecan-9-one (4) was prepared from 1, 5-dimethylbicyclo[3.3.0]octan-3-one (6) in fourteen steps. Its cyclopropane ring opening reaction was examined under various conditions. In all runs, 11-substituted 1, 2, 6-trimethyltricyclo[5.3.1.02, 6]undecan-9-ones 20 were obtained as major products along with 7-substituted 1, 2, 8-trimethyltricyclo[6.3.0.0<2, 6>]undecan-4-ones 21 and two other products 22 and 23.
1, 2, 6-三甲基四环[5.3.1.0<2, 6&tg;.0<8, 11>]十一烷-9-酮(4)由1, 5-二甲基双环[3.3.0]辛烷-3-酮(6)通过14步反应制备而成。在各种条件下对其环丙烷环开环反应进行了研究。在所有反应中,11-取代的1, 2, 6-三甲基三环[5.3.1.02, 6]十一烷-9-酮20作为主要产物与7-取代的1, 2, 8-三甲基三环[6.3.0.0<2, 6>]十一烷-4-酮21以及另外两种产物22和23一起被得到。