Synthesis of two aromatic methylenedioxy-substituted colchicine congeners: elucidation of the structure of cornigerine as 2,3-(methylenedioxy)-2,3-didemethoxycolchicine
Four new colchicinoids, gloriosamines A-D, were isolated from the aerial parts of Gloriosa rothschildiana. The structure of gloriosamine A, including the absolute configuration, was determined by chemical conversion from colchicine. (c) 2007 Elsevier Ltd. All rights reserved.