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Abstract
Convenient syntheses of 6-prenyl- and 8-isoprenyl-3-arylcoumarins (7a–d and 8c–d) from 2-prenyloxy-4-methoxybenzaldehydes (5a and 5b) and of pyrano-3-arylcoumarins (10a–b) from 2-hydroxy-4-(1,1-dimethylpropynyloxy) benzaldehyde (9) using Wittig reaction are described.
ACKNOWLEDGMENTS
We thank Mr. A. P. Gadgil for IR and analytical data and IIT Mumbai for use of High Resolution NMR facility. One of us PPJ thanks UGC-New Delhi for the award of a senior research fellowship.