Wang, Zhiwei; Li, Shaobai; Li, Yulin, Bulletin des Societes Chimiques Belges, 1996, vol. 105, # 12, p. 787 - 788
作者:Wang, Zhiwei、Li, Shaobai、Li, Yulin
DOI:——
日期:——
Reactions of 3-(1-Hydroxyalkyl)phthalides with Acids: Synthesis of (<i>Z</i>)-3-Alkylidenephthalides and 3-Alkyl-8-hydroxyisocoumarins
作者:Raghao S. Mali、Kantipudi N. Babu
DOI:10.1021/jo971622e
日期:1998.4.1
acid-catalyzed method for the synthesis of (Z)-3-butylidenephthalides 5 and a novel and general route to 3-alkyl-8-hydroxy/methoxyisocoumarins 6-8 fromphthalides 9 is described. The hydroxyphthalides 4 and 10 were obtained by condensation of the phthalide anion with butyraldehyde and acetaldehyde. Reaction of hydroxyphthalides 4 with a mixture of orthophosphoric acid and formic acid gave the (Z)-3