1426655-65-3

Upstream product

• 674-82-8 4-methyleneoxetan-2-one 
• 546-68-9 titanium(IV) isopropylate 
• 110862-46-9 5-(4-fluorophenyl)-2-(1-methylethyl)-1-(3-oxopropyl)-N,4-diphenyl-1H-pyrrole-3-carboxamide 

Downstream Products

• 1035205-25-4 (3R,5R)-isopropyl 7-[2-(4-fluorophenyl)-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrol-1-yl]-3,5-dihydroxyheptanoate 
• 1112262-71-1 2-((4R,6R)-6-(2-(3-(phenylcarbamoyl)-5-(4-fluorophenyl)-2-isopropyl-4-phenyl-1H-pyrrol-1-yl)ethyl)-2,2-dimethyl-1,3-dioxan-4-yl)acetic acid isopropyl ester 

Relevant academic research and scientific papers

New chloramphenicol Schiff base ligands for the titanium-mediated asymmetric aldol reaction of α,β-unsaturated aldehydes with diketene: A short synthesis of atorvastatin calcium

Several novel chiral Schiff base ligands were prepared from a commercially available chloramphenicol base and applied to the titanium-mediated asymmetric aldol reaction of diketene with various α,β-unsaturated aldehydes. This reaction proceeded in good yield with high enantioselectivity. The synthetic utility of this methodology was demonstrated in the short synthesis of atorvastatin calcium.

Synthetic studies on statins. Part 1: A short and cyanide-free synthesis of atorvastatin calcium via an enantioselective aldol strategy

A short and cyanide-free enantioselective synthesis of atorvastatin calcium has been achieved starting from a commercially available highly substituted 1,4-diketone in an overall yield of 40%. The key step in this approach is the asymmetric aldol reaction of an aldehyde with diketene in the presence of Ti(O-i-Pr)4-Schiff base complex to create the (5R)-stereochemistry of atorvastatin calcium.