Switchable synthesis of cyclic carbamates by carbon dioxide fixation at atmospheric pressure
作者:Yasunori Toda、Minoru Shishido、Tatsuya Aoki、Kimiya Sukegawa、Hiroyuki Suga
DOI:10.1039/d1cc02493k
日期:——
base-promoted switchable synthesis of five- and six-membered cyclic carbamates using atmospheric pressure carbondioxide as the C1source was developed. The chemoselectivity of products was simply controlled by changing bases and solvents. The reaction proceeds effectively undermildconditions, affording valuable cyclic carbamates. Experimental results and DFT studies revealed the reaction mechanism.
Efficient Synthesis of β‐Amino Alcohols Catalyzed by Niobium Pentachloride: Regioselective Ring Opening of Epoxides with Aromatic Amines
作者:A. Venkat Narsaiah、D. Sreenu、K. Nagaiah
DOI:10.1080/00397910600908884
日期:2006.10.1
Abstract Epoxides undergo a rapid ring‐opening reaction with aromatic amines catalyzed by niobium pentachloride under mild reaction conditions. All the reactions were carried out at room temperature to afford the corresponding β‐amino alcohols in excellent yields and with high regioselectivity. IICT Communication No. 050916
Base-mediated synthesis of cyclic dithiocarbamates from 1-amino-3-chloropropan-2-ol derivatives and carbon disulfide
作者:Yasunori Toda、Masaya Iwasaki、Hiroyuki Suga
DOI:10.1039/d3ob01070h
日期:——
An efficient method for the preparation of six-membered cyclicdithiocarbamates is described, in which triethylamine effectively promotes the reaction of 1-amino-3-chloropropan-2-ol derivatives with carbon disulfide. On the basis of the experimental and theoretical studies, a reaction mechanism is proposed to explain the difference between the present reaction and our previously reported carbon dioxide
Potassium Dodecatungstocobaltate Trihydrate (K<sub>5</sub>CoW<sub>12</sub>O<sub>40</sub> · 3H<sub>2</sub>O) as an Efficient Catalyst for Aminolysis of Epoxides
作者:E. Rafiee、Shahram Tangestaninejad、M. H. Habibi、V. Mirkhani
DOI:10.1081/scc-200032411
日期:2004.1.1
Aminolysis of epoxides using various amines was catalyzed with potassium dodecatungstocobaltate trihydrate in a convenient and efficient method with good selectivities.
Selective biocatalytic aminolysis of (±)-epichlorohydrin: Synthesis and ICAM-1 inhibitory activity of (S)-(+)-3-arylamino-1-chloropropan-2-ols
作者:Pankaj Gupta、Sumati Bhatia、Ashish Dhawan、Sakshi Balwani、Shatrughan Sharma、Raju Brahma、Rajpal Singh、Balaram Ghosh、Virinder S. Parmar、Ashok K. Prasad
DOI:10.1016/j.bmc.2011.02.029
日期:2011.4
Regio-and enantioselective synthesis of (S)-(+)-3-arylamino-1-chloropropan-2-ols has been achieved by the epoxide ring opening of (+/-)-epichlorohydrin with different aromatic amines in the presence of Candida rugosa lipase. Activities of seven model (S)-(+)-3-arylamino-1-chloropropan-2-ols, out of 10 compounds synthesized, have been evaluated for the inhibition of tumor necrosis factor-alpha TNF-alpha) induced expression of intercellular adhesion molecule-1 (ICAM-1), which is one of the factors responsible for the modulation of inflammation in biological systems; (S)-(+)-1-chloro-3-(2'-chlorophenylamino)-propan-2-ol has been found to exhibit highest activity, that is, 86% inhibition of TNF-alpha induced expression of ICAM-1 at a concentration of 40 mu g/ml. (C) 2011 Elsevier Ltd. All rights reserved.