Synthesis of Atorvastatin Lactone Linker Constructs for Target Fishing
作者:Pramod Sawant、Martin E. Maier
DOI:10.1002/ejoc.201201154
日期:2012.10.15
synthesis of the diol-containing side-chain were a catalytic enantioselective vinylogous aldol reaction resulting in 5-hydroxy-enoate 14 (88 % ee). Subsequent intramolecular oxa-Michael addition and amide reduction furnished key building block 5. As we have described previously, Paal–Knorr reaction of amine5 with diketone 6 led to pyrrole 7, which – after carboxylation – provided acid 8. Since atorvastatin
salts has rendered the products easily isolable, which greatly improved the synthetic practicality of the monodefluoroborylation reaction. Stoichiometric experiments indicate that the fate of the regioselectivity depends on the mode of β-fluorine elimination, which depends on the substrate. Further transformation of the boryl group has allowed facile preparation of fluoroalkene derivatives as exemplified
METHOD FOR THE PREPARATION OF ATORVASTATIN AND INTERMEDIATES USED THEREIN
申请人:Ahn Soon Kil
公开号:US20110015407A1
公开(公告)日:2011-01-20
The present invention relates to a novel method for preparing atorvastatin. According to the present invention, provided are a novel intermediate of the preparation of atorvastatin and a method of preparing large amounts of atorvastatin in a safe manner using the intermediate.
[EN] METHOD FOR THE PREPARATION OF ATORVASTATIN AND INTERMEDIATES USED THEREIN<br/>[FR] PROCÉDÉ DE PRÉPARATION D'ATORVASTATINE ET INTERMÉDIAIRES UTILISÉS DANS LEDIT PROCÉDÉ
申请人:CHONG KUN DANG PHARM CORP
公开号:WO2009093776A1
公开(公告)日:2009-07-30
The present invention relates to a novel method for preparing atorvastatin. According to the present invention, provided are a novel intermediate of the preparation of atorvastatin and a method of preparing large amounts of atorvastatin in a safe manner using the intermediate.
We describe a novel strategy to the atorvastatin lactone based on a Paal–Knorr synthesis of pyrrole 24 by condensing diketone 23 with primary amine 22. The latter contains the syn-1,3-diol subunit and a benzyl ether function at the other end of the chain. This allowed for manipulations on the pyrrole ring via iodination at C2, metalation with t-BuLi and carboxylation. The obtained acid 26 could be