THE REACTION OF 3-ACETYL COUMARIN WITH ALKYL PHOSPHITES AND PHOSPHONIUM YLIDES
作者:Fayez H. Osman、Naglaa M. Abd El-Rahman、Fatma A. El-samahy
DOI:10.1080/10426509808032462
日期:1998.1
Abstract Dialkyl phosphites reacted with 3-acetyl coumarin (1) at 100°C for about 5 h to give the phosphonates having structure 4. Methylation of compounds 4 with ethereal solution of diazomethane gave the respective methyl ethers 5. Treatment of 1 with trimethylphosphite afforded a mixture of the phosphonates 5a and 4a whereas with triethyl phosphite gave a mixture of compounds 6 and 4b. The reaction