METHOD FOR THE PREPARATION OF CAPECITABINE AND INTERMEDIATES USED IN SAID METHOD
申请人:Coll Farma S.L.
公开号:EP2241556A1
公开(公告)日:2010-10-20
A process to obtain capecitabine compound and its pharmaceutically acceptable derivatives is hereby disclosed. Likewise, novel intermediates to be used in the preparation of capecitabine compound and its pharmaceutically acceptable derivatives are also disclosed. The procedure comprises the stage of causing a reaction of N4-(n-pentyloxycarbonyl))-5- fluorocytosine with (1,2,3-tri-O-acetyl-5-deoxy- α,β-D-ribofuranose.
Diastereo- and enantioselective synthesis of 4- and 3,4-substituted 2-acetoxy-butyrolactones
作者:Dieter Enders、Hongbin Sun、Frederik R. Leusink
DOI:10.1016/s0040-4020(99)00283-5
日期:1999.5
An efficient asymmetric synthesis of 4-mono- and 3,4-disubstituted 2-acetoxy-butyrolactones 2 has been developed, based on a hydrazone-mediated asymmetric aldol reaction, an intramolecular lactonization and a stereoselective hydrogenation of the resulting butenolides 1. An application of this process in the synthesis of the natural hunger substance 3 (ee = 90%) is also presented, (C) 1999 Elsevier Science Ltd. All rights reserved.
Enantioselective Total Synthesis of (+)-Amphirionin-4
作者:Arun K. Ghosh、Prasanth R. Nyalapatla
DOI:10.1021/acs.orglett.6b00942
日期:2016.5.6
An enantioselectivetotalsynthesis of (+)-amphirionin-4 has been accomplished in a convergent manner. The synthesis features an efficient enzymatic lipase resolution to access the tetrahydrofuranol core in optically active form. The functionalized tetrahydrofuran derivative was synthesized via an oxocarbenium ion-mediated highly diastereoselective syn-allylation reaction. The polyene side chain was