Nc Goomer

Synthesis of 2-Hydroxy-4, 6-Dimethoxycrotonophenone A New Class of Natural Products from Dysophylla Stellata Benth

Abstract 2-Hydroxy-4, 6-dimethoxycrotonophenone (1), isolated from the plant Dysophylla stellata Benth. by Joshi and Ravindranath,1 is the only example of an open chain form of chromanones. The co-occurrence of the crotonophenone (1) with chromone and butyrophenone1 suggests that these are biogenetically related in the same way as chalcones are to flavonoids.2 It is likely that more crotono-phenones and 2-methylchromanones will be discovered in nature.

Synthesis of Cycloartocarpesin Trimethyl Ether

Abstract The synthesis of chromenoflavone, cycloartocarpesin trimethyl ether (1b) has been achieved through the aroylation of lithium enolate of evodionol (2) with 2,4-dimethoxybenzoyl chloride followed by cyclodehydration of the β-diketone (3) with D-toluenesulphonic acid.