Total synthesis of scopine, pseudoscopine, and nor- derivatives
摘要:
Scopine and pseudoscopine have been synthesised from cyclohepta-3.5-dienol: the initial 1,4-fuctionalisation of the diene is based on a nitroso-cycloaddition. The use of the N-benzyloxycarbonyl group throughout the scheme allows ultimate reductive deprotection to yield N-methyl or novel NH (nor-) derivatives without damage to the exo-epoxide of the title compounds. Preliminary investigation of nitroso- cycloaddition to 5,6-epoxycyclohepta-1.3-diene is described. Copyright (C) 1996 Elsevier Science Ltd.
Total synthesis of scopine, pseudoscopine, and nor- derivatives
作者:David E. Justice、John R. Malpass
DOI:10.1016/0040-4020(96)00693-x
日期:1996.9
Scopine and pseudoscopine have been synthesised from cyclohepta-3.5-dienol: the initial 1,4-fuctionalisation of the diene is based on a nitroso-cycloaddition. The use of the N-benzyloxycarbonyl group throughout the scheme allows ultimate reductive deprotection to yield N-methyl or novel NH (nor-) derivatives without damage to the exo-epoxide of the title compounds. Preliminary investigation of nitroso- cycloaddition to 5,6-epoxycyclohepta-1.3-diene is described. Copyright (C) 1996 Elsevier Science Ltd.
Exo- and endo-6-hydroxy- and 6,7-epoxytropanes; Total synthesis of scopine, pseudoscopine, and nor-derivatives
作者:David E Justice、John R Malpass
DOI:10.1016/0040-4039(95)00836-2
日期:1995.6
Novel endo- 6,7-epoxy-8-azabicyclo[3.2.1]octanederivatives and the corresponding exo-analogues have been synthesized and show substantially different reactivity; the resistance of the exo-epoxides to ring opening during hydride reduction and catalytic hydrogenolysis is exploited in a total synthesis of scopine, pseudoscopine, and nor -derivatives.