Boron trifluoride catalysed rearrangement of 1,2-epoxy lupan-3-one

Boron trifluoride catalysed rearrangement of 1,2-epoxy-lupan-3-one (III) yielded IV. Oxidation of IV with pyridine-chromium trioxide yielded IX

Synthesis of clausenin, xanthoxyletin, alloxanthoxyletin, xanthyletin and nor-dalbergin

The synthesis of clausenin is reported. Clausenin on methylation, NaBH4 reduction and dehydration of the secondary alcohol gives xanthoxyletin. The angular isomer of clausenin by a similar series of reactions gives alloxanthoxyletin. A convenient synthesis of xanthyletin and nor-dalbergin has also been achieved

Chemical investigation of some Indian plants

Isolation of several known compounds belonging to the class of steroids, terpenoids, coumarins, etc., from a number of Indian plants is recorded