CLAISEN REARRANGEMENTS-XV STRUCTURE REVISION OF THE COUMARIN, CELERIN, BY SYNTHESIS

Article abstract of DOI:10.1016/S0040-4020(01)91276-1

The four possible structures, 9,12,17 and 26 for celerin have been synthesised and the structure of the natural product revised to 8-hydroxy-7-methoxy-5-(1,1-dimethylallyl)coumarin 26.Efficient alternative synthetic routes to sibiricol 5, coumurrayin 6 and pinnarin 13 have been established.