Novel Rearrangement of an Isocaryolane Sesquiterpenoid under Mitsunobu Conditions
作者:Juan C. Racero、Antonio J. Macías-Sánchez、Rosario Hernández-Galán、Peter B. Hitchcock、James R. Hanson、Isidro G. Collado
DOI:10.1021/jo000765p
日期:2000.11.1
Under modified Mitsunobu reaction conditions, a novel skeleton rearrangement of terpenes has been obtained. The reactivity of 8, 9-dioxygenated isocaryolane derivatives has been investigated. When either (8R,9R)-8-methoxyisocaryolane-9-ol (7) or (8R, 9R)-isocaryolane-8,9-diol (10) are treated under acidic conditions, isocaryolan-9-one (9) and the rearrangement compound (1S,2S,5R,8S)-1, 4,4-trimethyltricyclo[6
在改良的Mitsunobu反应条件下,获得了萜烯的新型骨架重排。已经研究了8、9-二加氧异芳烷衍生物的反应性。当在酸性条件下处理(8R,9R)-8-甲氧基异芳烷-9-ol(7)或(8R,9R)-异芳烷-8,9-二醇(10)时,异方烷-9-一(9)和得到重排化合物(1S,2S,5R,8S)-1,4,4-三甲基三环[6.2.1.0(2,5)]十一烷-8-甲醛(11)。否则,在改良的Mitsunobu条件下处理化合物7和10会导致产生新的倍半萜衍生物(1S,2S,5R,9R)-1,4,4-三甲基三环[7.2.1.0(2,5)] dodecan-8-one( 8)。据我们所知,这是由Mitsunobu引起的频哪醇重排的第一个例子。都探讨了底物和反应条件对反应进行的影响。