In hydrothermal reactions at 150–180 °C, 2-(arylamino)nicotinic acids were synthesized by amination of 2-chloronicotinic acid with aromatic amine derivatives, with potassium carbonate as base. The procedure is efficient, environmentally friendly, and practical, with moderate to excellent yields (up to 98%).
A potent ACAT (acyl-CoA: cholesterolacyltransferase) inhibitor SMP-797 was effectively synthesized by the urea formation of 3-amino-4-aryl-1,8-naphthyridin-2(1H)-one and 4-amino-2,6-diisopropylamine. The synthesis of the former compound involved the Suzuki coupling reaction as a key step, and the latter was prepared by the 4-selective nitration of 2,6-diisopropylaniline using 2,3,5,6-tetrabromo-4-methyl-4-nitro-2
N-PROP-2-YNYL CARBOXAMIDE DERIVATIVES AND THEIR USE AS TRPA1 ANTAGONISTS
申请人:ORION CORPORATION
公开号:US20150376130A1
公开(公告)日:2015-12-31
Compounds of formula I, wherein A, B, X, Z and R
1
-R
6
, are as defined in the claims, exhibit TRPA 1 activity and are thus useful as TRPA1 modulators.
Microwave-assisted synthesis of 2-aminonicotinic acids by reacting 2-chloronicotinic acid with amines
作者:Camilo E. Quevedo、Vassilios Bavetsias、Edward McDonald
DOI:10.1016/j.tetlet.2009.03.034
日期:2009.5
2-(Methylamino)nicotinic acid was readily prepared in high yield by reacting 2-chloronicotinic acid with 40% aq MeNH2 under microwave irradiation either at 120 degrees for 2 h or at 140 degrees C for 1.5 h. Subsequently, we found that a range of 2-aminonicotinic acids could be obtained under microwave heating. The optimal reaction conditions involved the use of 3 equiv of amine, water as the solvent and heating at 200 degrees C for 2 h in the presence of diisopropylethylamine (3 equiv). (C) 2009 Elsevier Ltd. All rights reserved.
BRUNEL S.; MONTGINOUL C.; TORREILLES E.; CIRAL L., J. HETEROCYCL. CHEM., 1980, 17, NO 2, 235-240
作者:BRUNEL S.、 MONTGINOUL C.、 TORREILLES E.、 CIRAL L.