1226972-37-7

Basic information

• Product Name: (2R)-acetoxy-2-(2-chlorophenyl)acetic acid
• Synonyms: (2R)-acetoxy-2-(2-chlorophenyl)acetic acid
• CAS NO: 1226972-37-7
• Molecular Weight: 228.632
• Mol File: 1226972-37-7.mol

Chemical Properties

• CAS DataBase Reference: (2R)-acetoxy-2-(2-chlorophenyl)acetic acid(CAS DataBase Reference)
• NIST Chemistry Reference: (2R)-acetoxy-2-(2-chlorophenyl)acetic acid(1226972-37-7)
• EPA Substance Registry System: (2R)-acetoxy-2-(2-chlorophenyl)acetic acid(1226972-37-7)

Safety Data

• Hazardous Substances Data: 1226972-37-7(Hazardous Substances Data)

Upstream product

• 10421-85-9 (R)-2-chloromandelic acid 
• 108-24-7 acetic anhydride 
• 178437-75-7 2-acetoxy-2-(2-chlorophenyl)acetic acid 

Downstream Products

• 10421-85-9 (R)-2-chloromandelic acid 

Relevant articles and documents

PROCESS FOR THE PREPARATION OF OPTICALLY ACTIVE BERAPROST

The invention provides a new process for the preparation of optically active Beraprost of formula (I) starting from racemic Beraprost alkyl ester through hydrolysis, enantiomer esterification, preparation of diacyl -Beraprost ester diastereomers and their separation and hydrolysis.

Increased catalyst productivity in α-hydroxy acids resolution by esterase mutation and substrate modification

Optically pure α-hydroxy acids and their derivatives are versatile chiral building blocks in the pharmaceutical industry. In this study, the potential of a recombinant Pseudomonas putida esterase (rPPE01) for the enzymatic resolution of α-acetoxy acids was significantly improved by combinatorial engineering of both the biocatalyst and substrate. Semirational design based on homologous modeling and molecular docking provided a single-point variant, W187H, whose kcat/KM for sodium 2-acetoxy-2-(2′-chlorophenyl)acetate (Ac-CPA-Na) was increased 100-fold, from 0.0611 to 6.20 mM-1 s-1, while retaining its excellent enantioselectivity and broad substrate spectrum. Biocatalyst deactivation under the operating conditions was decreased by using the potassium salt of Ac-CPA instead of Ac-CPA-Na. With 0.5 g L-1 of lyophilized cells containing rPPE01-W187H, 500 mM (R,S)-Ac-CPA-K was selectively deacylated with 49.9% conversion within 15 h, giving satisfactory enantiomeric excesses (ee) for both the S product (>99% ee) and the remaining R substrate (98.7% ee). Consequently, the amount of (S)-2-hydroxy-2-(2′-chlorophenyl)acetate prepared per unit weight of lyophilized cells was improved by a factor of 18.9 compared with the original productivity of the wild-type esterase. Further enzymatic resolution of other important hydroxy acids at the 100 mL scale demonstrated that the rPPE01-W187H-based bioprocess is versatile and practical for the large-scale preparation of chiral α-hydroxy acids.