Eine einfache und flexible Synthese von Pyrrolen ausα,β-ungesättigten Sulfonen
摘要:
The addition of alkyl isocyanoacetates and isocyanoacetonitrile to alpha,beta-unsaturated sulfones affords a convenient and broad access to pyrroles with unusual substitution patterns (see Scheme 2). The alpha,beta-unsaturated sulfones required as starting materials are easily obtained from different olefines.
We report the synthesis of a novel class of dendritic prodrugs via Passerini reaction in one pot. Such dendrimers feature a simultaneous attachment of a conventional non-steroidal anti-inflammatory drug (NSAID) (such as ibuprofen and aspirin) and a nitric oxide (NO)-releasing moiety (such as an organic nitrate) onto their surface, and are therefore regarded as new drug delivery systems for NO-releasing
Process For Preparing Porphyrin Derivatives, Such As Protoporphyrin (IX) And Synthesis Intermediates
申请人:Martin Pierre
公开号:US20080242857A1
公开(公告)日:2008-10-02
The present invention relates to a process for preparing a porphyrin of formula (I), optionally in the form of a salt with an alkali metal and/or in the form of a metal complex:
in which:
R and R′ are as defined in claim
1
,
comprising:
a step of condensation, in an acidic medium, between a dipyrromethane of formula (II):
in which R′b is as defined above for (I),
and a dipyrromethane of formula (III):
in which R″ is as defined in claim
1
, and also the compounds of formula (III).
Application of Ugi three component reaction for the synthesis of quinapril hydrochloride
作者:Bhushan B. Borase、Himanshu M. Godbole、Girij P. Singh、Pritesh R. Upadhyay、Anurag Trivedi、Varadaraj Bhat、Gautham G. Shenoy
DOI:10.1080/00397911.2019.1682168
日期:2020.1.2
concise synthesis of chirally pure quinapril hydrochloride is described. The key step is the formation of α-amino amide backbone in one step using Ugi threecomponentreaction. This method allows short access to α-amino amide chain which is a part of many drugs used for treatment of high blood pressure. A large molecular library can be synthesized by changing the components in Ugi reaction. GRAPHICAL
Enantioselective synthesis of (−)-chloramphenicol via silver-catalysed asymmetric isocyanoacetate aldol reaction
作者:Allegra Franchino、Pavol Jakubec、Darren J. Dixon
DOI:10.1039/c5ob02141c
日期:——
A concise synthesis of (−)-chloramphenicol, based on the catalytic asymmetric aldol reaction between 4-nitrobenzaldehyde and benzhydryl isocyanoacetate, is reported.
Nonprostanoid prostacyclin mimetics. 5. Structure-activity relationships associated with [3-[4-(4,5-diphenyl-2-oxazolyl)-5-oxazolyl]phenoxy]acetic acid
作者:Nicholas A. Meanwell、Jeffrey L. Romine、Michael J. Rosenfeld、Scott W. Martin、Ashok K. Trehan、J. J. Kim Wright、Mary F. Malley、Jack Z. Gougoutas、Catherine L. Brassard
DOI:10.1021/jm00076a018
日期:1993.11
cis-olefin moiety of 3 into various ring systems was examined. Incorporation of the cis-olefin of 3 into either an oxazole (26) or an unsubstituted pyrazole (35) heterocycle provided compounds that are equipotent with progenitor 3. However, the oxazole 11f, which is isomeric with 26, inhibits ADP-induced human platelet aggregation in vitro with an IC50 of 0.027 microM, 6-fold more potent than 3, 26, or