Xanthine derivatives, the preparation thereof and their use as pharmaceutical compositions
申请人:Boehringer Ingelheim Pharma GmbH & Co. KG
公开号:US20040138214A1
公开(公告)日:2004-07-15
Disclosed are substituted xanthines of general formula
1
wherein R
1
to R
4
are defined hereinbelow, the tautomers, the stereoisomers, the mixtures thereof, the prodrugs thereof and the salts thereof, which have valuable pharmacological properties, particularly an inhibitory effect on the activity of the enzyme dipeptidylpeptidase-IV (DPP-IV).
XANTHINE DERIVATIVES, THE PREPARATION THEREOF AND THEIR USE AS PHARMACEUTICAL COMPOSITIONS
申请人:HIMMELSBACH Frank
公开号:US20090093457A1
公开(公告)日:2009-04-09
Disclosed are substituted xanthines of general formula
wherein R
1
to R
4
are defined hereinbelow, the tautomers, the stereoisomers, the mixtures thereof, the prodrugs thereof and the salts thereof, which have valuable pharmacological properties, particularly an inhibitory effect on the activity of the enzyme dipeptidylpeptidase-IV (DPP-IV).
A binap-ligated copper dimer has been heterogenized on a pillar-layered MOF surface for the first time using a hydroxamic acid linker. This MOF-supported dimeric copper photocatalyst demonstrates much higher activity and recyclability than its homogeneous counterparts in intra- and intermolecular radicalreactions of N-acyloxy imidates and O-acyl oximes.