A simple synthesis of 3-deoxyanthocyanidins and their O-glucosides
作者:Sheiraz Al Bittar、Nathalie Mora、Michèle Loonis、Olivier Dangles
DOI:10.1016/j.tet.2016.05.076
日期:2016.7
This work deals with the chemical synthesis of simple analogs of anthocyanins, the main class of water-soluble natural pigments. Flavylium ions with hydroxyl, methoxyl and β-d-glucopyranosyloxyl substituents at positions 4′ and 7 have been prepared by straightforward chemical procedures. Moreover, the two 3-deoxyanthocyanidins of red sorghum apigeninidin (4′,5,7-trihydroxyflavylium) and luteolinidin
IMIDAZOTHIADIAZOLE AND IMIDAZOPYRAZINE DERIVATIVES AS PROTEASE ACTIVATED RECEPTOR 4 (PAR4) INHIBITORS FOR TREATING PLATELET AGGREGATION
申请人:BRISTOL-MYERS SQUIBB COMPANY
公开号:US20150094297A1
公开(公告)日:2015-04-02
The present invention provides thiazole compounds of Formula I wherein W, Y, R
0
, R
2
, R
4
, R
5
, R
6
, R
7
, X
1
, X
2
, X
3
and X
4
are as defined herein, or a stereoisomer, tautomer, pharmaceutically acceptable salt, prodrug ester or solvate form thereof, wherein all of the variables are as defined herein. These compounds are inhibitors of platelet aggregation and thus can be used as medicaments for treating or preventing thromboembolic disorders.
The current synthesis routes of anthocyanins are relatively complicated, which significantly hinders their development. We optimized the method by introducing a selective iodination reaction and also established a general scheme for preparing anthocyanin diglycosides. This method allows anthocyanin synthesis to require fewer steps and costs. Based on this, we prepared four common anthocyanins and two