Structure-odor correlation, XXV. Synthesis and Olfactory Properties of the “Inverse” Megastigmatrienone and Its Analogs
作者:Peter Weyerstahl、Kai Licha
DOI:10.1002/jlac.199719970918
日期:1997.9
The oxoisophorone monoacetal 2 is a convenient starting material for the synthesis of several megastigmatrienone analogs. Thus, the Wittig reaction of ketone 2, followed by deprotection, led to the dienones 7–10. The “inverse” megastigmatrienone 1 was synthesized from 2 via homologation (1112), Grignard reaction (13) and hydrolysis. The mixture of the four stereoisomers of 1 is dominated by (E,E)-1
氧代异佛尔酮单缩醛2是用于合成数个大三苯甲基三烯酮类似物的方便原料。因此,酮2的Wittig反应,然后脱保护,导致二烯酮7-10。“逆” megastigmatrienoneone 1是由2经同源化(11 12),格利雅(Grignard)反应(13)和水解合成的。的四种立体异构体的混合物,1是由(主导ë,ë - )1。相反,(Z,Z)-1当从2开始并通过反应顺序14 15 16 17然后进行醛17的(Z)-选择性Wittig反应时,得到作为主要产物的C 3 -C 6。同样地,酮醛17是NOR衍生物20的起始原料。的气味评价1表明,巨豆三烯酮的典型的强和愉快的气味烟草d决不是观察到,无论是在强度也不在质量。在另一方面,四个立体异构体1都表现出了类似的弱到中等强度的花香,甜,新鲜,香豆素类香调的气味。