[EN] METHODS AND INTERMEDIATES FOR THE PREPARATION OF MACROLACTAMS<br/>[FR] PROCÉDÉS ET INTERMÉDIAIRES POUR LA PRÉPARATION DE MACROLACTAMES
申请人:MERCK SHARP & DOHME
公开号:WO2015095430A1
公开(公告)日:2015-06-25
The present invention relates to synthetic processes useful in the preparation of macrolactams that inhibit hepatitis C virus (HCV), specifically macrolactam compounds that inhibit the HCV NS3 protease activity and have application in the treatment of conditions caused by HCV. The present invention also encompasses intermediates useful in the disclosed synthetic processes and the methods of their preparation.
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 enantiomericallypure C6-formyl side chain 3. The 1,3-syn-diol acetal motif in 3 was established with excellent stereo
描述了从商业上可获得的(S)-表氯醇开始的匹伐他汀钙(1)的有效,简明的不对称合成。会聚Ç 1条+ C 6路线允许的组件中的匹伐他汀的C 7侧链经由鏻盐之间的维悌希反应2和对映体纯Ç 6 -甲酰基侧链3。1,3-顺式在二醇缩醛基序3是由非对映选择性铋促进的双组分半缩醛/氧杂迈克尔加成反应具有优良的立体声控制建立(小号)-α,β-不饱和酮4与乙醛
A total synthesis of (+)-negamycin through isoxazolidine allylation
作者:Roderick W. Bates、Rab'iah Nisha Khanizeman、Hajime Hirao、Yu Shan Tay、Patcharaporn Sae-Lao
DOI:10.1039/c4ob00537f
日期:——
The β-amino acid antibiotic (+)-negamycin has been synthesised in ten steps from epichlorohydrin via Sakurai allylation of an isoxazolidine intermediate. The key allylation reaction proceeded with complete trans-selectivity, which is attributed to electrostatic attraction between the chlorine atom and the iminium ion in the Sakurai intermediate.
A novel, stereoselective approach towards rosuvastatin calcium from the known (S)-homoallylic alcohol has been developed. The synthesis is highlighted by a regio- and stereocontrolled ICl-induced intramolecular cyclization of chiral homoallylic carbonate to deliver the C6-formyl statin side chain with a syn-1,3-diol moiety. An improved synthesis of the rosuvastatin pyrimidine core moiety is also included
Routiennocin is a member of a family of polycyclic pyrrole ether antibiotics that simultaneously uncouple oxidative phosphorylation and inhibit ATPase as a result of selective complexation of divalent metal ions. We describe a concise synthesis of routiennocin with the longest linear sequence of 8 steps. Our synthesis features a unique bi-directional strategy, which entails a sequential ring-opening/cross