869588-52-3

Upstream product

• 173723-62-1 (S)-allylglycine methyl ester hydrochloride 
• 32150-91-7 phthaloyl-L-phenylalanyl chloride 

Downstream Products

• 142589-43-3 (S)-2-[(S)-2-(1,3-dihydro-1,3-dioxo-2H-isoindol-2-yl)-1-oxo-3-phenylpropyl]-6-oxo-hexanoic acid methyl ester 

Relevant academic research and scientific papers

HYDROFORMYLATION PROCESS FOR PHARMACEUTICAL INTERMEDIATE

The invention relates to an improved process for the preparation of an advanced synthetic intermediate of ACE inhibitors. In one aspect, the present invention is based on a novel process for the preparation of an aldehyde of formula (I), wherein (N)PrG is a protected amino group, R is an alkyl or aralkyl group and X1-4 are each independently H or a non-reacting substituent, which comprises hydroformylation of an α-olefin of formula (II), by reaction with syngas (CO/H2) in the presence of, as catalyst, a group VIII transition metal complex of a phosphorus-containing ligand. Aldehyde (I), the product of linear hydroformylation, is formed in preference to aldehyde (III). In another aspect of the invention, α-olefin (II) is a novel composition. The process to convert (II) to (I) enables an efficient manufacturing route to MDL 28,726 and analogues.