[EN] 2-CYANOPYRROLES AND THEIR ANALOGUES AS DDP-IV INHIBITORS<br/>[FR] 2-CYANOPYRROLES ET LEURS ANALOGUES EN TANT QU'INHIBITEURS DE DIPEPTIDYLPEPTIDASE-IV (DP-IV)
申请人:NOVO NORDISK AS
公开号:WO2004089362A1
公开(公告)日:2004-10-21
The present invention relates to therapeutically active and selective inhibitors of the enzyme DPP-IV having the formula I: (I) The invention furthermore relates to pharmaceutical compositions comprising the compounds and the use of such compounds for the manufacture of medicaments for treating diseases that are associated with proteins which are subject to inactivation by DPP-IV, such as type 2 diabetes and obesity.
1,8-diazabicyclo[5.4.0]undec-7-ene (dbu): An effective base for the introduction of tbutyldimethylsilyl group in organic compounds.
作者:Jesus M. Aizpurua、Claudio Palomo
DOI:10.1016/s0040-4039(00)61915-9
日期:1985.1
Reaction of alcohols, thiols, amines, carboxylic acids, phenols, hydroquinones, ketoesters and amides with equimolecular amounts of t-butyldimethylchlorosilane and DBU, even in solvents other than dimethylformamide affords the corresponding t-butyldimethylsilyl derivatives in high yield.
β-Lactams as Formal Dipoles through Amide-Bond Activation
作者:Vincent Barbier、Jérôme Marrot、François Couty、Olivier R. P. David
DOI:10.1002/ejoc.201501342
日期:2016.1
Activation of β-lactams can be achieved by simple Lewis-base catalysis to trigger an unprecedented reaction based on the formal dipolar behaviour of a strained amide bond. A new synthetic route for 1,3-oxazinan-6-ones is presented by reaction of β-lactams with ethylglyoxylate, which after methodological optimizations identified 4-pyrrolidinopyridine as the catalyst of choice in aprotic polar solvents
From Penicillin to Penem and Carbapenem. IX. C<sub>1</sub>-Unit Introduction and the Carbapenam Synthesis from the Penicillin Molecule
作者:Katsumi Fujimoto、Yuji Iwano、Koichi Hirai
DOI:10.1246/bcsj.59.1887
日期:1986.6
An effective method for (R)-1-hydroxyethylation of benzyl bis(phenylseleno)penicillanate is described. The hydroxyethylated product was transformed into the 4-methylsulfonyl- and 4-phenylsulfonyl-2-azetidinone derivatives. These monocyclic compounds were reacted with potassium cyanide under two-phase conditions to give the 4-cyano-2-azetidinone derivative (C1-unit introduction) in high yield. The cyano group was then converted into the iodomethyl group. Using the 4-iodomethyl-2-azetidinone derivative an isopenam derivative was synthesized. Furthermore, carbapenam derivative were also constructed by a novel [3+2] cyclization reaction between 4-iodomethyl-2-azetidinone and dimethyl 2-methylthio- and 2-phenylthiofumarate.
A short synthesis of (±) 7-oxo-3-oxa-1-azabicyclo[3.2.0] heptane-2-carboxylic acid.
作者:Dieter Häbich、Paul Naab、Karl Metzger
DOI:10.1016/s0040-4039(00)81981-4
日期:1983.1
A short 4-step synthesis of the title compound 3 , an inhibitor of β-lactamases, is presented. The essential step utilizes the palladium(O)-catalyzed deprotection of an allyl ester.