作者:C.W. Bird、K. Naidoo
DOI:10.1016/s0040-4020(01)85936-6
日期:1988.1
2-di(carboxymethyl)-1-phenylcyclohexane. A two stage cyclisation of this diacid via intramolecular acylation gave 9,10-benzobicyclo[5.3. 2.01,6]dodecan-8,12-dione as an attractive precursor of the morphinan ring system. Alternatively, the foregoing diacid could be cyclised to phenylbicyclo[4,3,0]nonan-8-one which was converted into 2-methyl-4a-phenyl-trans-decahydroisoquinoline.
苯与7a-乙氧基甲基八氢苯并呋喃-2-酮的弗里德-克来福特烷基化反应得到1,2-二(羧甲基)-1-苯基环己烷。通过分子内酰化作用对该二酸进行两阶段环化,得到9,10-苯并双环[5.3。2.0 1,6 ] dodecan-8,12-dione作为吗啡喃环系统的诱人前体。或者,可以将上述二酸环化成苯基双环[4,3,0]壬南-8-,其被转化为2-甲基-4a-苯基-反式-十氢异喹啉。