110862-46-9Relevant articles and documents
The total synthesis of calcium atorvastatin
Dias, Luiz C.,Vieira, Adriano S.,Barreiro, Eliezer J.
, p. 2291 - 2296 (2016)
A practical and convergent asymmetric route to calcium atorvastatin (1) is reported. The synthesis of calcium atorvastatin (1) was performed using the remote 1,5-anti asymmetric induction in the boron-mediated aldol reaction of β-alkoxy methylketone (4) with pyrrolic aldehyde (3) as a key step. Calcium atorvastatin was obtained from aldehyde (3) after 6 steps, with a 41% overall yield.
PROCESS FOR THE PREPARATION OF ATORVASTATIN AND INTERMEDIATES
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Page/Page column 12, (2008/06/13)
A process is provided for preparing (R)-5-[2-(4-fluorophenyl)-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrol-1-yl]-5-hydroxy-3-oxo-1-heptanoic acid, R-substituted ester 9 comprising: (a) reacting the aldehyde 1 with the enolate form of (S)-2-hydroxy-1,2,2-triphenylethyl acetate substituent in a chelating co-solvent; (b) hydrolysis of (R,S)-5-[2-(4-fluorophenyl)-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrol-1-yl]-3-hydroxy-1-pentanoic acid, (S)-2-hydroxy-1,2,2-triphenylethyl ester (2a and 2b) using a base, preferably an alkali metal base, preferably in a solvent to form the carboxylic acid 7; (c) treating the acid 7 with a chiral base to form a salt and purifying the salt to obtain enantiomerically enriched (R)-7 chiral base salt; (d) alkylation of the (R)-7 chiral base salt or the free base derived from (R)-7, forming (R)-5-[2-(4-fluorophenyl)-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrol-1-yl]-5-hydroxy-3-oxo-1-heptanoic acid, R-substituted ester 9 and atorvastatin calcium 6, wherein R is a C1 to C6 alkyl, C6 to C9 aryl or C7 to C10 aralkyl.
Inhibitors of Cholesterol Biosynthesis. 3. Tetrahydro-4-hydroxy-6--2H-pyran-2-one Inhibitors of HMG-CoA Reductase. 2. Effects of Introducing Substituents at Positions Three and Four of the Pyrrole Nucleus
Roth, B. D.,Blankley, C. J.,Chucholowski, A. W.,Ferguson, E.,Hoefle, M. L.,et al.
, p. 357 - 366 (2007/10/02)
A series of trans-tetrahydro-4-hydroxy-6--2H-pyran-2 ones and their dihydroxy acids were prepared and tested for their ability to inhibit the enzyme HMG-CoA reductase in vitro.Inhibitory potency was found to increase subtantially when substituents were introduced into positions three and four of the pyrrole ring.A systematic exploration of structure-activity relationships at these two positions led to the identification of a compound ((+)-33, (+)-(4R)-trans-2-(4-fluorophenyl)-5-(1-methylethyl)-N,3-diphenyl-1- -1H-pyrrole-4-carboxamide) with five times the inhibitory potency of the fungal metabolite compactin.