Development of a Scalable Synthesis of (S)-3-Fluoromethyl-γ-butyrolactone, Building Block for Carmegliptin’s Lactam Moiety
摘要:
Several new routes are reported for the synthesis of (S)-3-fluoromethyl-gamma-butyrolactone. An asymmetric hydrogenation-based synthesis was chosen as the enabling route to produce the lactone on a 10-kg scale. A superior stereoselective route starting from (S)-tert-butyl glycidyl ether which afforded the desired lactone in three steps with similar to 50% overall yield was finally selected for further development and production.
PROCESS FOR THE PREPARATION OF (S)-4-FLUOROMETHYL-DIHYDRO-FURAN-2-ONE
申请人:Zutter Ulrich
公开号:US20080108816A1
公开(公告)日:2008-05-08
The present invention relates to a process of the preparation of (S)-4-fluoromethyl-dihydro-furan-2-one of the formula
by employing a dialkylmalonate of the formula
wherein R
1b
is lower alkyl, and the use of this process for the manufacture of DPP-IV inhibitors that are useful for the treatment and/or prophylaxis of diseases such as diabetes.
[EN] PROCESS FOR THE PREPARATION OF (S)-4-FLUOROMETHYL-DIHYDRO-FURAN-2-ONE<br/>[FR] PROCÉDÉ DE PRÉPARATION DE LA (S)-4-FLUOROMÉTHYL-DIHYDRO-FURAN-2-ONE
申请人:HOFFMANN LA ROCHE
公开号:WO2008055814A2
公开(公告)日:2008-05-15
[EN] The present invention relates to a process of the preparation of (S)-4-fluoromethyl-dihydro-furan-2-one of the formula (I) by employing a dialkylmalonate of the formula (V) wherein R1b is lower alkyl, and the use of this process for the manufacture of DPP-IV inhibitors that are useful for the treatment and/or prophylaxis of diseases such as diabetes. [FR] La présente invention porte sur un procédé de préparation de la (S)-4-fluorométhyl-dihydro-furan-2-one de la formule (I) par l'emploi d'un malonate de dialkyle de la formule (V) dans laquelle R1b est alkyle inférieur, et sur l'utilisation de ce procédé pour la fabrication d'inhibiteurs DPP-IV qui sont utiles pour le traitement et/ou la prophylaxie de maladies telles que le diabète.
Development of a Scalable Synthesis of (<i>S</i>)-3-Fluoromethyl-γ-butyrolactone, Building Block for Carmegliptin’s Lactam Moiety
Several new routes are reported for the synthesis of (S)-3-fluoromethyl-gamma-butyrolactone. An asymmetric hydrogenation-based synthesis was chosen as the enabling route to produce the lactone on a 10-kg scale. A superior stereoselective route starting from (S)-tert-butyl glycidyl ether which afforded the desired lactone in three steps with similar to 50% overall yield was finally selected for further development and production.