Nearly eighty substituted thiocarbanilides–viz., p -(2-thiazolyl)-, p -(4-thiazolyl)- and p -(5-thiazolyl)- p -alkoxy-thiocarbanilides, and p - p ′-bis(4-thiazolyl)-thiocarbanilides, along with a few thiazolyl thiocarbanilides having halogens on the phenyl ring containing the p ′-alkoxy group, have been synthesized and studied for in vitro antitubercular activity. Also described are over 40 new substituted
A Scalable Procedure for Light-Induced Benzylic Brominations in Continuous Flow
作者:David Cantillo、Oscar de Frutos、Juan A. Rincon、Carlos Mateos、C. Oliver Kappe
DOI:10.1021/jo402409k
日期:2014.1.3
A continuous-flow protocol for the bromination of benzylic compounds with N-bromosuccinimide (NBS) is presented. The radical reactions were activated with a readily available household compact fluorescent lamp (CFL) using a simple flow reactor design based on transparent fluorinated ethylene polymer (FEP) tubing. All of the reactions were carried out using acetonitrile as the solvent, thus avoiding
提出了使用N-溴代琥珀酰亚胺(NBS)溴化苄基化合物的连续流程方案。使用基于透明氟化乙烯聚合物(FEP)管的简单流式反应器设计,使用易于获得的家用紧凑型荧光灯(CFL)激活自由基反应。所有反应均使用乙腈作为溶剂进行,从而避免使用有害的氯化溶剂,例如CCl 4。对于每种底物,仅需要1.05当量的NBS即可将苄基原料完全转化为相应的溴化物。通过溴化一组包含不同官能团的19种底物,证明了该方法的一般特征。在所有情况下均获得了良好的分离效果。通过使反应器运行更长的时间(吞吐量为30 mmol h –1),可以很容易地将新的流量规程缩放到几克数量,这在分批光化学反应器中不容易实现。溴化方案也可以在更大流量的反应器中使用功率更大的灯以相同的效率执行。以苯丙酮溴化为模型,所需溴化物的产率为180 mmol h –1。
Silyl- and germylmercurials in organic synthesis. A new route to O-silylated and O-germylated enolates
The exchange reaction of α-mercurated ketones with bis(triethylsilyl)- (I) and bis(triethylgermyl)mercury (II) leads to the formation of the corresponding triethylsilyl and triethylgermyl enol ethers. O-Silylated and O-germylated enolates derived from ketones and aldehydes can be also prepared by treating mercurials I and II with appropriate α-bromo-carbonyl compounds. This new pathway also represents
Compounds and compositons for treating C1s-mediated diseases and conditions
申请人:3-Dimensional Pharmaceuticals, Inc.
公开号:US20020037915A1
公开(公告)日:2002-03-28
Disclosed is a method for treating the symptoms of an acute or chronic disorder mediated by the classical pathway of the complement cascade, comprising administering to a mammal in need of such treatment a therapeutically effective amount of a compound of Formula I
1
or a solvate, hydrate or pharmaceutically acceptable salt thereof; wherein R
1
, R
2
, R
3
, R
4
, X, Y and Z are defined in the specification.
Mild and Efficient Method for α-Thiocyanation of Ketones and β-Dicarbonyl Compounds Using Bromodimethylsulfonium Bromide–Ammonium Thiocyanate
作者:Dinesh S. Bhalerao、Krishnacharya G. Akamanchi
DOI:10.1080/00397910902838938
日期:2010.2.26
An efficient and convenient method for α-thiocyanation of ketones and β-dicarbonyl compounds has been developed using a reagent combination of bromodimethylsulfonium bromide (BDMS) and ammonium thiocyanate in acetonitrile. The developed method is mild and gave good yield of the products at room temperature.