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1H-2-Benzopyran-3-acetic acid, 1-oxo- synthesis

2synthesis methods
-

Yield:-

Steps:

Multi-step reaction with 2 steps
1: 58 percent / CHCl3 / 48 h / Heating
2: 80 percent / 50percent H2SO4 / tetrahydrofuran / 12 h / Ambient temperature

References:

Gore;Narasimhan [Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry,1991,vol. 30,# 2,p. 241 - 246]