91735-53-4Relevant articles and documents
Synthesis of Barbigerone, a Naturally Occurring Pyranoisoflavone
Pathak, V. P.,Saini, T. R.,Khanna, R. N.
, p. 89 - 90 (2007/10/02)
4'-Benzyloxy-2'-hydroxy-2,4,5-trimethoxychalcone (III) on benzylation gives 2',4'-dibenzyloxy-2,4,5-trimethoxychalcone (IV), which on epoxidation furnishes the corresponding epoxide (V).The latter on rearrangement with BF3-etherate gives 7-hydroxy-2',4',5'-trimethoxyisoflavone (II), via α-formyldesoxybenzoin (VI).II on reaction with 2-methyl-2-chlorobut-3-yne furnishes barbigerone (I), identical with a natural sample.