Methylation of methyl α-d-hexopyranosides with diazo-methane in the presence of a small amount of water
作者:Yuko Inoue、Kinzo Nagasawa
DOI:10.1016/0008-6215(87)80024-1
日期:1987.11
Abstract The long-time reduction of methylα-d -gluco-, α-d -manno-, and α-d -galactopyranosides with excess diazomethane-diethyl ether at 25° in the presence of water gave all partially methylated methylα-d -hexopyranosides which differ in number and position of methyl substitution. The presence of electrolytes, such as potassium or sodium phosphate, in the reaction medium enhanced the degree of methylation