Aporphines 10. Approaches to the synthesis of 7-hydroxyaporphines
作者:F.E. Granchelli、J.L. Neumeyer
DOI:10.1016/s0040-4020(01)90654-4
日期:1974.1
for the stereoselectivesynthesis of 7-hydroxyaporphine (3a) and 7-hydroxynoraporphine (3b) via the 4-oxazolin-2-one 20 as a protecting group has been developed. Pschorr cyclization of 20 and hydrolysis of the oxazoloaporphine 21 with trifluoroacetic acid led exclusively to the dehydronoraporphine 22. Reduction of 21 with LAH gave 3a and treatment of 21 with methyllithium gave 3b. The synthesis of 10