Benzoid-quinoid tautomerism in azomethines and their structural analogs. 46. Synthesis and reactions of 2-(N-isatinomethylene)-3(2H)-benzo[b]thiophenone
描述了一种在KHCO 3作为碱存在下,用两种相同的靛红铜( I ) 催化制备色胺菊酯及其衍生物的温和方法。此外,更复杂的色胺酮衍生物通过两步获得,一锅使用两种不同的靛红。该工作具有原料易得、反应条件温和、操作简单、官能团耐受性好、收率高、选择性高等特点。这种转化不仅为获取色胺酮及其衍生物提供了一种新方法,而且丰富了靛红和铜催化的化学性质。
Novel quinazolinamide derivatives of the formula (I), in which R
1
-R
3
have the meanings indicated in Claim
1,
are HSP90 inhibitors and can be used for the preparation of a medicament for the treatment of diseases in which the inhibition, regulation and/or modulation of HSP90 plays a role.
Preparation of 2-trifluoromethyl cinchoninic acids
申请人:Union Carbide Agricultural Products Company, Inc.
公开号:US04267333A1
公开(公告)日:1981-05-12
2-Trifluoromethyl cinchoninic acids can be prepared in high yields by reaction of an alkali metal 2-aminophenylglyoxylate and 1,1,1-trifluoroacetone in the presence of a weak acid and a metal salt of a weak acid. Preferably reaction is effected by first hydrolyzing isatin, or a substituted isatin, in the presence of an alkali metal hydroxide to produce the alkali metal 2-aminophenylglyoxylate, and then reacting this intermediate product with 1,1,1-trifluoroacetone without isolating it from the reaction medium.
Reaction of acetyl- and 1,1′-diacetylferrocene with isatin (Pfitzinger reaction)
作者:A. I. Moskalenko、A. V. Boeva、V. I. Boev
DOI:10.1134/s1070363211030157
日期:2011.3
An efficient method for the synthesis of 2-ferrocenyl-substituted quinoline-4-carboxylic acids via the reaction of acetyl- and 1,1'-diacetylferrocene with isatin under the conditions of the Pfitzinger reaction was developed. Starting from the obtained acids methyl esters, amides, N-methyl-N-methoxyamides, and oximes (at one of the free acetyl groups) of some of these compounds were synthesized.
BREN, ZH. V.;RYBALKIN, V. P.;BREN, V. A., XIMIYA GETEROTSIKL. SOED.,(1989) N, S. 1217-1220