Affiliation:
1. Department of Chemistry, R. K. Mission Vivekananda Centenary College, Rahara, Kolkata – 700118, West Bengal, India
Abstract
Aluminium amalgam – mediated reductive dimerisation of 3-methoxycarbonyl-4-oxo-4H-1-benzopyran produced two sets of diastereomeric bichromones coupled through 2,2′ and 2,4′- positions; the latter set of diastereomers underwent diastereoconvergent dehydration to produce Z-3,3′-dimethoxycabonyl-3H-2,4′-bi[1-benzopyran-2-ylidene]-4-one.