A convenient synthesis of linear 2-methylpyranochromones.

VK Ahluwalia, A Jain, R Gupta

Index: Ahluwalia, Vinod Kumar; Jain, Anjula; Gupta, Ranjna Bulletin of the Chemical Society of Japan, 1982 , vol. 55, # 8 p. 2649 - 2652

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Citation Number: 5

Abstract

A convenient synthesis of linear 2-methylpyranochromones, viz., spatheliachromen (5- hydroxy-2, 2, 8-trimethyl-2H, 6H-benzo [1, 2-b: 5, 4-b′] dipyran-6-one), O- methylspatheliachromen (5-methoxy-2, 2, 8-trimethyl-2H, 6H-benzo [1, 2-b: 5, 4-b′] dipyran- 6-one)(8) and O-methylallopteroxylin (5-methoxy-2, 8, 8-trimethyl-4H, 8H-benzo [1, 2-b: 3, 4- b′] dipyran-4-one) is described by blocking the eighth position of the corresponding 7- ...

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