作者:A. Srikrishna、Santosh J. Gharpure
DOI:10.1021/jo0102765
日期:2001.6.1
Enantiospecific synthesis of the natural enantiomer of the marine sesquiterpene (-)-4-thiocyanatoneopupukeanane (6) is described. The bicyclo[2.2.2]octanecarboxylate 14, obtained from (R)-carvone via Michael-Michael reaction, was transformed into neopupukeananedione 12 by employing rhodium acetate catalyzed intramolecular C-H insertion of the diazo ketones 16 or 19 as the key reaction. Regioselective
描述了海洋倍半萜烯(-)-4-硫代氰基酮-opupukeanane(6)的天然对映体的对映体特异性合成。经由迈克尔-迈克尔反应从(R)-香芹酮获得的双环[2.2.2]辛烷羧酸14,通过使用乙酸铑催化的重氮酮16或19的分子内CH插入,转化为新pupukeananedione 12。C-2酮的区域选择性脱氧将二酮12转化为neopupukean-4-one10。或者,酮酯18也通过在18中将酮进行区域选择性脱氧,然后进行分子内铑类胡萝卜素CH转化为neopupukean-4-one 10。重氮酮31的插入。最后,将新pupukeanan-4-one 10通过醇32和甲磺酸酯33转化为(-)-4-thiocyanatoneopupukeananeane 6。