Process for preparing S-metoprolol and intermediates therefor
申请人:Astra Pharmaceutical
Production AB
公开号:EP0339006A1
公开(公告)日:1989-10-25
A process for preparing S-metoprolol of the formula
or a salt thereof, with high enantiomeric purity, is described, whereby a (S)-5-hydroxymethyl-3-isopropyloxazolidin-2-one sulfonic acid ester of the formula
is prepared, and further reacted with 4-[2-methoxyethyl]phenol of the formula
and the resulting intermediate of the formula
is hydrolysed to S-metoprolol, and whereby the (S)-5-hydroxymethyl-3-isopropyloxazolidin-2-one sulfonic acid ester of formula II is prepared by reacting (S)-3-isopropylamino-1,2-propanediol of the formula
with a chloroformic acid ester of the formula
Cl--OR′ VI
wherein R′ is an alkyl group having 1-3 carbon atoms or a phenyl group, to the formation of (S)-5-hydroxymethyl-3-isopropyloxazolidin-2-one of the formula
which is reacted with an activated sulfonic acid of the formula
wherein R˝ is an aryl group such as tolyl and X is a halogen such as Cl, to formation of the ester of formula II, which when required is enriched with the (S)-enantiomer by crystallization.
一种制备高对映体纯度的 S-美托洛尔(式
或其盐的高对映异构体纯度的工艺。
制备出(S)-5-羟甲基-3-异丙基恶唑啉-2-酮磺酸酯,并进一步与式
反应,生成的式
水解为 S-美托洛尔,而式 II 的(S)-5-羟甲基-3-异丙基恶唑啉-2-酮磺酸酯的制备方法是将式的(S)-3-异丙基氨基-1,2-丙二醇与氯仿酸酯反应
的氯仿酸酯与式
Cl--OR′ VI
其中 R′为具有 1-3 个碳原子的烷基或苯基,生成式为 (S)-5- 羟甲基-3-异丙基恶唑啉-2-酮的 (S)-5- 羟甲基-3-异丙基恶唑啉-2-酮。
与式中的活化磺酸反应
其中 R˝ 是芳基,如甲苯基,X 是卤素,如 Cl,形成式 II 的酯,需要时通过结晶富集 (S)- 对映异构体。
ISAKSSON, R.;LAMM, B., J. CHROMATOGR., 1986, 362, N 3, 436-438
作者:ISAKSSON, R.、LAMM, B.
DOI:——
日期:——
GYLLENHAAL O.; VESSMAN J., J. CHROMATOGR., 395,(1987) 445-453