Synthesis of Delta(7,8)-morphinan-6-one by Grewe cyclization and bromoketalization reaction as crucial steps is described. Introduction of a hydroxyl group at 14-position is demonstrated by direct oxidation with MnO2 in the presence of silica gel. (C) 2002 Elsevier Science Ltd. All rights reserved.
Synthesis of racemic 3-hydroxy-N-methyl-6-oxomorphinan (Chemistry of opium alkaloids, Part XIV)
作者:C. Olieman、Ph. Nagelhout、A. D. de Groot、L. Maat、H. C. Beyerman
DOI:10.1002/recl.19800991108
日期:——
The preparation of racemic 3-hydroxy-N-methyl-6-oxomorphinan (5) by acid-catalysed cyclization of 1-(4-hydroxybenzyl)-1,2,3,4,5,8-hexahydro-6-methoxy-2-methylisoquinoline (4) and its 4′-methyl ether 6 is described. The corresponding N-formyl derivatives did not give the desired cyclization.