2,5-diaryl tetrahydrofurans and analogs thereof as PAF antagonists
申请人:Merck & Co., Inc.
公开号:US04977146A1
公开(公告)日:1990-12-11
The present invention is directed to a specifically substituted tetrahydrofuran of the formula (I) ##STR1## wherein R.sup.4 is an alkylthio, alkylsulfinyl or alkylsulfonyl containing group, Y is an alkyl or substituted alkyl group, R.sup.6 is an alkyl or a substituted alkyl group and the substituents at positions 3, 4 or 5 are acyclic.
GLYCOSIDASE INHIBITORS AND METHODS OF SYNTHESIZING SAME
申请人:Pinto M. Brian
公开号:US20070244184A1
公开(公告)日:2007-10-18
The compounds of the present invention relate to chain-extended and chain-modified analogues of salacinol, including embodiments where the sulfate moiety has been substituted with a carboxylate or phosphate moiety. In other embodiments the sulfate moiety has been shifted by one carbon atom in the zwitterionic structure. In another embodiment the polyhydroxylated side chain may be replaced with a lipophilic alkyl chain and a suitable counterion. The invention also encompasses methods for synthesizing the salacinol analogues and using the analogues for enzyme inhibition applications.
Synthesis of phosphate derivatives related to the glycosidase inhibitor salacinol
作者:Ramakrishna G. Bhat、Nag S. Kumar、B. Mario Pinto
DOI:10.1016/j.carres.2007.05.030
日期:2007.9
The syntheses of polyhydroxylated imino- and anhydro thio-alditol compounds related to the naturally occurring glycosidase inhibitor, salacinol, containing a phosphate group in the side chain are described. The compounds lack hydroxyl groups on the acyclic side chain and are prototypes of the exact salacinol analogue. The synthetic strategy relies on the Mitsunobu reaction of N- and S-hydroxyalkyl derivatives of 2,3,5-tri-O-benzyl-1,4-dideoxy-1,4-imino-D-arabinitol and 1,4-anhydro-2,3,5-tri-O-benzyl-l-thio-D-arabinitol with dibenzyl phosphate to yield the corresponding protected heteroalditol phosphates. Screening of these compounds against recombinant human maltase glucoamylase (NIGA), a critical intestinal glucosidase involved in the processing of oligosaccharides of glucose into glucose itself, shows that they are not effective inhibitors of MGA and demonstrates the importance of the hydroxyl and/or Sulfate substituents present on the side chain for effective inhibition. The attempted synthesis of the exact analogue of salacinol by opening of cyclic phosphates is also described. (c) 2007 Elsevier Ltd. All rights reserved.
New 2, 5-diaryl tetrahydrofurans and analogs thereof as paf antagonists