This invention provides a process for producing a 5-hydroxy-3-oxopentanoic acid, a useful pharmaceutical intermediate, easily from a readily available, inexpensive starting material without using any extraordinary production equipment such as a very-low-temperature reactor.
Thus, this invention provides a process for producing a 5-hydroxy-3-oxopentanoic acid
which comprises permitting a lithium amide to act upon a mixture of an acetic acid ester and a 3-hydroxypropionic acid derivative at not below −20° C.
Further, this invention also provides a process for producing a 5-hydroxy-3-oxopentanoic acid
which comprises treating a mixture of an acetic acid ester and a 3-hydroxypropionic acid derivative with a Grignard reagent to prepare a mixture of a compound and an acetic acid ester of the above formula (I),
and permitting a lithium amide to act upon the mixture at a temperature not below −20° C.
                            这项发明提供了一种从易得、廉价的起始材料中轻松生产一种有用的药物中间体5-羟基-
3-氧代戊酸的方法,而无需使用任何特殊的生产设备,如极低温反应器。因此,这项发明提供了一种生产5-羟基-
3-氧代戊酸的方法,包括让
锂酰胺作用于
乙酸酯和
3-羟基丙酸衍
生物的混合物,温度不低于-20°C。此外,这项发明还提供了一种生产5-羟基-
3-氧代戊酸的方法,包括用
格氏试剂处理
乙酸酯和
3-羟基丙酸衍
生物的混合物,以制备上述结构式(I)的化合物和
乙酸酯的混合物,然后让
锂酰胺在不低于-20°C的温度下作用于该混合物。