New 1-C-(5-thio-d-xylopyranosyl) derivatives as potential orally active venous antithrombotics
摘要:
In the search for new orally active antithrombotic drugs that are metabolically stable, we explored the synthesis of 1-C-(5-thio-D-xylosyl) derivatives, examining radical and nucleophilic methods. Thus synthesized were aryl, benzyl, alkylcarboxymethylenyl, arylsulfonylmethylenyl and alkylaminocarboxymethylenyl C-linked analogues of 5-thio-D-xylopyranosides. (C) 2003 Elsevier Science Ltd. All rights reserved.
Stereoselective U-4CRs with 1-amino-5-desoxy-5-thio-2,3,4-O-isobutanoyl-β-d-xylopyranose—an effective and selectively removable chiral auxiliary
作者:Günther F Ross、Eberhardt Herdtweck、Ivar Ugi
DOI:10.1016/s0040-4020(02)00484-2
日期:2002.7
The Ugi four component reaction (U-4CR) offers a short and direct route for the synthesis of α-amino acid and peptide derivatives. With 1-amino-5-desoxy-5-thio-2,3,4-O-isobutanoyl-β-d-xylopyranose as a chiral amine component excellent chemical yields and stereoselectivities are obtained. After the U-4CR the chiral auxiliary can be cleaved off selectively under mild conditions. The configuration of
Stereoselective syntheses of α-amino acid and peptide derivatives by the U-4CR of 5-desoxy-5-thio-<small>D</small>-xylopyranosylamine
作者:Günther Ross、Ivar Ugi
DOI:10.1139/cjc-79-12-1934
日期:——
Since 1961, the synthesis of alpha-amino acids derivatives by the four-component reaction of isocyanides (U-4CR) as a one-pot reaction has been developed. Only recently it was found that a variety of these cc-amino acids compounds can be formed stereoselectively by the U-4CR using 1-amino-5-deoxy-5-thio-2,3,4-tri-O-isobutanoyl-beta-D-xylopyranose as the amine component. The stereoselectivity inducing auxiliary 5-desoxy-5-thio-D-xylopyranosyl group of the so-formed products can be replaced selectively by hydrogen.