1234331-56-6

Upstream product

• 121660-11-5 2-cyclopropyl-4-(4-fluorophenyl)-3-(hydroxymethyl)quinoline 

Downstream Products

• 147489-06-3 (4R,6S)-(E)-{6-[2-(2-cyclopropyl-4-(4-fluorophenyl)quinolin-3-yl)-vinyl]-2,2-dimethyl-1,3-dioxan-4-yl}acetic acid tert-butyl ester 
• 147526-32-7 pitavastatin calcium salt 
• 147526-32-7 pitavastatin 
• 586966-54-3 (3R,5S,6E)-7-[2-cyclopropyl-4-(4-fluorophenyl)-3-quinolyl]-3,5-dihydroxy-6-heptenoic acid tert-butyl ester 
• 1234331-52-2 2-({[2-cyclopropyl-4-(4-fluorophenyl)quinolin-3-yl]methyl}thio)benzo[d]thiazole 

Relevant academic research and scientific papers

Diastereoselective synthesis of pitavastatin calcium via bismuth-catalyzed two-component hemiacetal/oxa-Michael addition reaction

An efficient and concise asymmetric synthesis of pitavastatin calcium (1) starting from commercially available (S)-epichlorohydrin is described. A convergent C1 + C6 route allowed for the assembly of the pitavastatin C7 side chain via a Wittig reaction between phosphonium salt 2 and the enantiomerically pure C6-formyl side chain 3. The 1,3-syn-diol acetal motif in 3 was established with excellent stereo control by a diastereoselective bismuth-promoted two-component hemiacetal/oxa-Michael addition reaction of (S)-α,β-unsaturated ketone 4 with acetaldehyde.

For production of the precursor [...]

PROBLEM TO BE SOLVED: To provide a precursor compound of pitavastatin calcium excellent in safety and cost with high yield and high selectivity in a mild condition.SOLUTION: A method for producing a precursor compound of pitavastatin calcium of formula 1 is characterized by reacting a compound of formula 2 with a compound of formula 3 in the presence of an alkali metal salt selected from alkali metal carbonate, alkali metal acetate, and alkali metal propionate. (In the formulae, Ris a C-Calkyl group, and Ris an aryl group, an aralkyl group, or an alkyl group.)