Sequential Ring Expansion and Ketene Elimination Reactions in the Novel Rhodium(I)-Catalyzed Carbonylation of Thiazolidines
摘要:
1,3-Thiazolidines react with carbon monoxide, in the presence of catalytic quantities of chloro(1,5-cyclooctadiene)rhodium(I) dimer and potassium iodide, to give thiazolidinones in 56-88% yields. Reaction in the absence of KI afforded the six-membered ring thiazin-3-one, The rhodium(I) complex can catalyze the quantitative conversion of the thiazin-3-one to the thiazolidinone under carbon monoxide, with ketene as the reaction by-product. The conversion of thiazolidines to thiazolidinones involves a novel regiospecific insertion of carbon monoxide into one of two ring carbon-nitrogen bonds, as well as a metal-catalyzed ketene elimination process.
Cyclization of .ALPHA.- and .BETA.-alkylthio-substituted amines possessing positively charged carbon at the nitrogen. A new synthetic method for thiazolidines, thiomorpholines and dihydro-1,4-benzothiazines.
Thiazolopyrimidin-Derivate, Verfahren zu ihrer Herstellung und ihre Verwendung als Schädlingsbekämpfungsmittel
申请人:BAYER AG
公开号:EP0348746A2
公开(公告)日:1990-01-03
Die vorliegende Erfindung betrifft neue Thiazolopyrimidin-Derivate der allgemeinen Formel (I)
in welcher
R¹ für Wasserstoff oder Alkyl steht,
R² für Wasserstoff, Alkyl oder gegebenenfalls substituiertes Aryl steht,
R³ für jeweils gegebenenfalls substituiertes Alkyl, Cycloalkyl, Aryl, Arylcarbonyl oder Arylsulfonyl steht, und
X für Sauerstoff oder Schwefel steht,
welche als Schädlingsbekämpfungsmittel verwendet werden können.
本发明涉及通式(I)的新型噻唑并嘧啶衍生物
其中
R¹代表氢或烷基
R²代表氢、烷基或任选取代的芳基、
R³ 在每种情况下都是任选取代的烷基、环烷基、芳基、芳基羰基或芳基磺酰基,以及
X 是氧或硫、
可用作杀虫剂。
BARBRY D.; COUTURIER D., CHEM. BER., 120,(1987) N 6, 1073-1074
作者:BARBRY D.、 COUTURIER D.
DOI:——
日期:——
Sequential Ring Expansion and Ketene Elimination Reactions in the Novel Rhodium(I)-Catalyzed Carbonylation of Thiazolidines
作者:Kanjai Khumtaveeporn、Howard Alper
DOI:10.1021/ja00092a016
日期:1994.6
1,3-Thiazolidines react with carbon monoxide, in the presence of catalytic quantities of chloro(1,5-cyclooctadiene)rhodium(I) dimer and potassium iodide, to give thiazolidinones in 56-88% yields. Reaction in the absence of KI afforded the six-membered ring thiazin-3-one, The rhodium(I) complex can catalyze the quantitative conversion of the thiazin-3-one to the thiazolidinone under carbon monoxide, with ketene as the reaction by-product. The conversion of thiazolidines to thiazolidinones involves a novel regiospecific insertion of carbon monoxide into one of two ring carbon-nitrogen bonds, as well as a metal-catalyzed ketene elimination process.