Photoswitchable Glycolipid Mimetics: Synthesis and Photochromic Properties of Glycoazobenzene Amphiphiles
作者:Franziska Reise、Jonas E. Warias、Kuntal Chatterjee、Nicolai R. Krekiehn、Olaf Magnussen、Bridget M. Murphy、Thisbe K. Lindhorst
DOI:10.1002/chem.201803112
日期:2018.11.27
embedding of photosensitive glycolipid mimetics was envisioned and novel amphiphilic glycolipid mimetics comprising a photoswitchable azobenzene unit were synthesized. In this study, the photochromicproperties of these glycolipid mimetics were analyzed by means of UV/Vis spectroscopy and reversible photoswitching. The glycolipids were based on a racemic glycerolipid derivative to be comparable in
Versatile and scalable synthesis of cyclic organic carbonates under organocatalytic continuous flow conditions
作者:Romaric Gérardy、Julien Estager、Patricia Luis、Damien P. Debecker、Jean-Christophe M. Monbaliu
DOI:10.1039/c9cy01659g
日期:——
epoxides. In this work, cyclic organic carbonates are prepared according to alternative sustainable and intensified continuousflow conditions from the corresponding 1,2-diols. The process utilizes dimethyl carbonate (DMC) as a low toxicity carbonation reagent and relies on the organocatalytic activity of widely available and cheap organic ammonium and phosphonium salts. Glycerol is selected as a model
Highly regio- and stereoselective synthesis of cyclic carbonates from biomass-derived polyols<i>via</i>organocatalytic cascade reaction
作者:Hui Zhou、Hui Zhang、Sen Mu、Wen-Zhen Zhang、Wei-Min Ren、Xiao-Bing Lu
DOI:10.1039/c9gc03013a
日期:——
The cascade reaction of CO2, vicinal diols, and propargylicalcohol, was firstly achieved by dual Lewis base (LB) organocatalytic systems involving LB–CO2 adducts and commercially available organic amines. This methodology could overcome the chemical inertness of CO2, providing an alternative route to various functionalized five-membered cyclic carbonates in moderate to high yields under mild reaction
CO 2,邻二醇和炔丙醇的级联反应首先通过双路易斯碱(LB)有机催化体系实现,该体系涉及LB–CO 2加合物和可商购的有机胺。该方法可以克服CO 2的化学惰性,在温和的反应条件下(25°C,1.0 atm CO 2)以中等至高收率提供各种功能化的五元环状碳酸酯的替代路线)。更重要的是,该方法还可以用于由生物质衍生的多元醇轻松有效地合成手性多环碳酸酯,并完全保留手性中心的构型。这项研究为构建具有多功能基团和手性中心的增值环状碳酸酯提供了一种环境友好,可扩展且具有成本效益的方案。
X-ray contrast agents
申请人:Nycomed Imaging AS
公开号:US06406680B1
公开(公告)日:2002-06-18
This invention describes a new type of X-ray contrast agents. It has been found that iodinated alkenes containing one or several C═C double bonds substituted with electronic neutral substituents and iodine can be used as X-ray contrast agents. Also new iodoalkene compounds are described.
Compounds of Formula I are inhibitors of HIV integrase and inhibitors of HIV replication:
wherein X
1
, X
2
, Y, R
1A
, R
1B
, R
2
and R
3
are defined herein. The compounds are useful for the prophylaxis or treatment of infection by HIV and the prophylaxis, treatment, or delay in the onset or progression of AIDS. The compounds are employed against HIV infection and AIDS as compounds per se (or as hydrates or solvates thereof) or in the form of pharmaceutically acceptable salts. The compounds and their salts can be employed as ingredients in pharmaceutical compositions, optionally in combination with other antivirals, immunomodulators, antibiotics or vaccines. Processes for making compounds of Formula I and intermediates thereof are also described.