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1,3-Benzodioxole-4-carboxylic acid, 5-formyl- synthesis

2synthesis methods
-

Yield:-

Steps:

Multi-step reaction with 2 steps
1: p-toluenesulfonic acid / methanol / 1 h / Heating
2: 1) n-butyllithium / 1) ether, ice-water cooling, 1 h, 2) dry ice-acetone bath

References:

Napolitano, Elio;Giannone, Enrico;Fiaschi, Rita;Marsili, Antonio [Journal of Organic Chemistry,1983,vol. 48,# 21,p. 3653 - 3657]