Bulletin of the Chemical Society of Japan p. 1070 - 1072 (1980)
Update date:2022-08-03
Topics:
Ahluwalia, Vindo Kumar
Bhat, Krishna
Prakash, Chandra
Bala, Shashi
A convenient synthesis of linear pyranocoumarins (2H,8H-benzo<1,2-b: 5,4-b'>dipyran-2-ones), viz., xanthoxyletin, 4-methylxanthyletin and 4-phenylxanthyletin is described which uses blocking the 8-position of appropriate 7-hydroxycoumarin derivatives with iodine and 1,1-dimethyl-2-propynylation followed by cyclisation.
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