A four component coupling strategy for the synthesis of d-phenylglycinamide-derived non-covalent factor Xa inhibitors
摘要:
A novel isonitrile derivative was synthesized and used in an Ugi four component coupling reaction to explore aryl group substitution effects on inhibition of the coagulation cascade serine protease factor Xa. (C) 2003 Elsevier Science Ltd. All rights reserved.
与苯并[ d ]氧杂环庚烷-2,4(1 H,5 H)-二酮作为酸酐组分的Castagnoli–Cushman反应可用于制备2,3-二取代的4-氧代-2,3,4,5-四氢呋喃-1 H-苯并[ d ]氮杂-1-羧酸的产率为21–75%,反式非对映选择性良好。该方法适用于由芳族或α-支化脂族醛生成的亚胺,适用于平行合成和放大。还开发了将所得的反式-二取代的四氢苯并[ d ]氮杂环庚烷异构化成其顺式异构体的方法。
Access to Chiral Diamine Derivatives through Stereoselective Cu-Catalyzed Reductive Coupling of Imines and Allenamides
作者:Toolika Agrawal、Robert T. Martin、Stephen Collins、Zachary Wilhelm、Mytia D. Edwards、Osvaldo Gutierrez、Joshua D. Sieber
DOI:10.1021/acs.joc.0c02971
日期:2021.4.2
inducers in stereoselective synthesis that are challenging to prepare in a straightforward and stereoselective manner. Herein, we disclose a cost-effective and readily available Cu-catalyzed system for the reductive coupling of a chiral allenamide with N-alkyl substituted aldimines to access chiral 1,2-diamino synthons as single stereoisomers in high yields. The method shows broad reaction scope and
N,N-Dimethylphosphoramidic dichloride: a convenient reagent for the preparation of β-lactams from acetic acids and imines
作者:Fernando P Cossío、Iñaki Ganboa、Jesús M García、Begoña Lecea、C Palomo
DOI:10.1016/s0040-4039(00)96016-7
日期:1987.1
A convenient reagent for the preparation of β-lactams from aceticacids and imines is described. A new route to α-keto-β-lactams from 3-bis(ethylthio)β-lactams is also reported. Reaction of 4-acethyl-β-lactams with diazomethane is also made.
A series of cationic Ru(II)(η6-p-cymene) complexes with thioether-functionalized N-heterocyclic carbene ligands (imidazole and benzimidazole-based) have been prepared and used in the amidation reaction. The scope of the reaction has been investigated using the best catalyst.
一系列阳离子Ru(II)(η 6 - p -甲基异丙基苯)配合物与硫醚官能化的N-杂环卡宾配体(咪唑和苯并咪唑基)已被制备并用于酰胺化反应。已经使用最好的催化剂研究了反应的范围。
2-oxo-1-azetidinesulfonic acid salts
申请人:E. R. Squibb & Sons, Inc.
公开号:US04775670A1
公开(公告)日:1988-10-04
Antibacterial activity is exhibited by .beta.-lactams having a sulfonic acid salt substituent in the 1-position and an amino or acylamino substituent in the 3-position.
具有磺酸盐取代基在1-位和氨基或酰胺基取代基在3-位的β-内酰胺类化合物表现出抗菌活性。
Process for preparing a 2-oxo-1-azetidinesulfonic acid salt
申请人:E. R. Squibb & Sons, Inc.
公开号:US04529698A1
公开(公告)日:1985-07-16
A pharmaceutically acceptable salt of (R)-3-(acetylamino)-3-methoxy-2-oxo-1-azetidinesulfonic acid can be prepared by culturing Chromobacterium violaceum A.T.C.C. No. 31532 at about 25.degree. C. under submerged aerobic conditions on an aqueous nutrient medium containing an assimilable carbohydrate and nitrogen source.