[EN] NOVEL TRIAZOLO PYRIMIDINE COMPOUNDS AND A PROCESS OF PREPARATION THEREOF<br/>[FR] NOUVEAUX COMPOSÉS DE TRIAZOLOPYRIMIDINE ET LEUR PROCÉDÉ DE PRÉPARATION
申请人:SUNSHINE LAKE PHARMA CO LTD
公开号:WO2013163892A1
公开(公告)日:2013-11-07
Provided is a pyrimidine compound of formula (I) useful as a pharmaceutical intermediate, wherein Q is selected from the following groups: -C(R1R2), -(C=0), -BR3. Also provided are a process for preparing said pyrimidine compound, intermediates used in said process, and the use of said pyrimidine compound in the preparation of ticagrelor.
Efficient Formal Synthesis of Oseltamivir Phosphate (Tamiflu) with Inexpensive <scp>d</scp>-Ribose as the Starting Material
作者:Hiroshi Osato、Ian L. Jones、Anqi Chen、Christina L. L. Chai
DOI:10.1021/ol9024716
日期:2010.1.1
An efficient formal synthesis of oseltamivir phosphate (Tamiflu) has been achieved in 12 steps with use of the inexpensive and highly abundant D-ribose as the starting material. This concise alternative route does not utilize protecting groups and features the Introduction of 3-pentylidene ketal as the latent 3-pentyl ether, the use of a highly efficient RCM reaction to form the Tamiflu skeleton, and selective functional group manipulations.
An efficient synthesis of oseltamivir phosphate (Tamiflu) via a metal-mediated domino reaction and ring-closing metathesis
influenza neuraminidase inhibitor prodrug oseltamivir phosphate (Tamiflu) from cheap, commercially available d-ribose is described. The main features of this approach comprise a metal (Zn, In)-mediated domino reaction and ring-closing olefinmetathesis (RCM) of the resultant functionalized dienes to produce the Tamiflu skeleton. The synthesis described in this Letter represents a new and efficient transformation
Expeditious access to (−)-shikimic acid derivatives for Tamiflu synthesis
作者:Hiroshi Osato、Ian L. Jones、Huini Goh、Christina L.L. Chai、Anqi Chen
DOI:10.1016/j.tetlet.2011.09.035
日期:2011.11
A three-step, one-pot process has been developed for the synthesis of 5-epi-shikimic acid derivative 5 using inexpensive and abundant d-ribose as the starting material. Based on this pivotal intermediate, the syntheses of two key shikimic acid derivatives 6 and 7 for Tamiflu have been achieved in a concise and practical fashion.