酶促方法与多组分 Ugi 缩合相结合,是一种非常有效的非外消旋肽模拟物的简单合成方法。研究的目的是开发 1,3-二醇肽模拟物的酶动力学拆分,提供非外消旋化合物。在许多应用中,1,3-二醇可作为合成抗癌剂β-酰氧基甲基丙烯酰胺的中间体。研究了 Ugi 产品的立体选择性酶促酰化和水解。在两种情况下都确定了对映体或非对映体过量。因此,开发了一种用于合成手性、非外消旋 1,3-二醇肽模拟物的有效酶促方法。
[EN] BENZODIAZEPINE DERIVATIVES, COMPOSITIONS, AND METHODS FOR TREATING COGNITIVE IMPAIRMENT [FR] DÉRIVÉS DE BENZODIAZÉPINE, COMPOSITIONS ET PROCÉDÉS DE TRAITEMENT DE LA DÉFICIENCE COGNITIVE
The totalsynthesis of protoporphyrin IX and its disodium salt using a new alternative method to the classical MacDonald condensation is reported. The key step is the reaction of the new unsymmetrical diiodo dipyrrylmethane 1 with the known dipyrrylmethane 2. Coupling of the two fragments leads directly to porphyrin 3 without the need of an oxidizing agent. The new methodology is well suited for the
Novel Versatile Synthesis of Substituted Tetrabenzoporphyrins
作者:Olga S. Finikova、Andrei V. Cheprakov、Irina P. Beletskaya、Patrick J. Carroll、Sergei A. Vinogradov
DOI:10.1021/jo0350054
日期:2004.1.1
choice of the metal ions, and their influence on the yields of aromatization are discussed. The basic spectroscopic properties of newly synthesized Ar4TBP's and Ar4TCHP's are reported together with the first X-ray crystallographic structure of the NiAr4TBP complex.
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.