42383-63-1

Basic information

• Product Name: 2-(4-Chlor-2-methylphenoxy)propionsaeureanhydrid
• Synonyms: 2-(4-Chlor-2-methylphenoxy)propionsaeureanhydrid
• CAS NO: 42383-63-1
• Molecular Weight: 411.282
• Mol File: 42383-63-1.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 2-(4-Chlor-2-methylphenoxy)propionsaeureanhydrid(CAS DataBase Reference)
• NIST Chemistry Reference: 2-(4-Chlor-2-methylphenoxy)propionsaeureanhydrid(42383-63-1)
• EPA Substance Registry System: 2-(4-Chlor-2-methylphenoxy)propionsaeureanhydrid(42383-63-1)

Safety Data

• Hazardous Substances Data: 42383-63-1(Hazardous Substances Data)

Upstream product

• 93-65-2 (RS)-2-(4-chloro-o-tolyloxy)propionic acid 

Downstream Products

• 16484-77-8 (R)-Mecoprop 
• 25333-13-5 (S)-mecoprop 
• 94559-04-3 (R)-2-(4-Chloro-2-methyl-phenoxy)-propionic acid (R)-1-pyridin-4-yl-ethyl ester 
• 94559-03-2 (S)-2-(4-Chloro-2-methyl-phenoxy)-propionic acid (R)-1-pyridin-4-yl-ethyl ester 

Relevant articles and documents

Preparation of Optical Active 2-(Aryloxy)propionic Acids by Kinetic Resolution. - Herbizides

2-(Aryloxy)propionic anhydrides 2 were transformed with 70-90percent stereoselectivity into the R,S- or S,R-diastereomeric esters 4, respectively, on reaction with stoichiometric amounts of optical active 1-(4-pyridyl)ethanol (3).The acid 1 set free in one mol equivalent during this reaction was mainly the other enantiomer in 62-72percent optical yields.By treatment with boiling acetic anhydride and pyridine the acid 1 is transformed back into racemic anhydride 2.The ester 4 was hydrolyzed with aqueous acid to optical active 1 with regeneration of the optical active alcohol 3.In this way a quantitative transformation of racemic acids 1 into that enantiomer which is an active herbizide is possible using 3 as optical active auxiliary material.