S. Ceccarelli et al., SYNTHESIS OF NOVEL 2-SUBSTITUTED-5-OXYCOUMARANS VIA A DIRECT ROUTE TO2,3-DIHYDRO-5-HYDROXY-2-BENZOFURANACETIC ACIDS, Journal of heterocyclic chemistry, 30(3), 1993, pp. 679-690
A number of novel 2-substituted 2,3-dihydro-5-benzofuranols optionally
protected on 5-OH group have been prepared via a simple two step rout
e to racemic 2,3-dihydro-5-hydroxy-2-benzofuranacetic acids from hydro
quinones and 4-bromocrotonates.