反应详情

540 g (3.0 mol) of 3-(ethylhydroxyphosphinyl)-2-methylpropionic acid (produced as in Example 17) are at 80° C. dissolved in 400 ml of toluene and admixed with 594 g (6.6 mol) of 1,4-butanediol and esterified at about 100° C. in a distillation apparatus equipped with water trap during 4 h. On completion of the esterification the toluene is removed in vacuo to leave 894 g (92% of theory) of 4-hydroxybutyl 3-(ethyl-4-hydroxybutoxyphosphinyl)-2-methylpropionate as colorless oil.

1. customare at 80° C.
2. customesterified at about 100° C. in a distillation apparatus
3. customequipped with water trap during 4 h
4. customOn completion of the esterification the toluene is removed in vacuo