Dynamic aspects of methylation of catechol estrogen with diazomethane were investigated by means of thin-layer chromatography. The methylation rate of the hydroxyl group at the C-3 position was almost the same as that of the C-2 hydroxyl group in the reaction of 2-hydroxyestrogen, and 2-3 times that of the C-4 hydroxyl group in the reaction of 4-hydroxyestrogen. In these experiments, the maximum yields of 2-methoxyestrone, 2-hydroxyestrone 3-methyl ether, 4-methoxyestrone and 4-hydroxyestrone 3-methyl ether were 32, 39, 13 and 70%, respectively. In addition, demethylation of catechol estrogen dimethyl ethers with boron tribromide and synthesis of 4-hydroxyestrone monomethyl ethers are described.
通过薄层色谱法研究了二氮
甲烷与
邻苯二酚雌激素的甲基化反应的动态过程。在2-羟基
雌激素反应中,C-3位置的羟基甲基化速率几乎与C-2羟基相同,而在
4-羟基
雌激素反应中,C-3羟基的甲基化速率是C-4羟基的2-3倍。在这些实验中,2-甲氧基
雌酮、2-羟基
雌酮3-甲基醚、
4-甲氧基雌酮和
4-羟基雌酮3-甲基醚的最高产率分别为32%、39%、13%和70%。此外,还描述了用
三溴化硼脱除
邻苯二酚雌激素二甲基醚的甲基化和
4-羟基雌酮单甲基醚的合成。