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6-Hydroxy-7-methoxy-4-(3-methyl-2-butenyl)-5-benzofuranacrylic acid δ-lactone synthesis

2synthesis methods
-

Yield:-

Steps:

Multi-step reaction with 2 steps
1: N,N-diethylaniline / 1 h / Heating
2: K2CO3 / acetone / 24 h / Heating

References:

Loutfy;Khatibie [Pharmazie,1983,vol. 38,# 2,p. 137 - 138]