Lithium heptadecafluorooctanesulfonate catalyzed Mannich-type and aza-Diels–Alder reactions in supercritical carbon dioxide
摘要:
The Mannich-type reaction of imines with (1-methoxy-2-methylpropenyloxy)trimethylsilane and aza-Diels-Alder reaction of imines with Danishefsky's diene can be carried out in scCO(2) in the presence of lithium heptadecafluorooctanesulfonate which offer a way to synthesize beta-amino carbonyl compounds and nitrogen-containing six-membered ring compounds under environmentally benign conditions. (C) 2004 Elsevier Ltd. All rights reserved.
Strong Lewis acid air-stable cationic titanocene perfluoroalkyl(aryl)sulfonate complexes as highly efficient and recyclable catalysts for C–C bond forming reactions
A cationic iridium complex [Ir(cod)2]SbF6 was found to be a new and efficient Lewis acid catalyst for Mukaiyama aldol and Mannich reactions. Aldehydes react smoothly with silyl enol ethers to give β-siloxy ketones in the presence of 0.5 mol % of [Ir(cod)2]SbF6. The reaction of N-alkyl arylaldimines with ketene silyl acetals in the presence of 5 mol % [Ir(cod)2]SbF6/P(OPh)3 gave β-amino esters. After
Mannich-type reaction of (1-methoxy-2-methylpropenyloxy)trimethylsilane with arylaldehydes and aromatic amines catalyzed by perfluorinated rare earth metal salts in fluorous phase
作者:Min Shi、Shi-Cong Cui、Ying-Hao Liu
DOI:10.1016/j.tet.2005.03.059
日期:2005.5
reaction in fluorous phase. By use of perfluorodecalin (C10F18, cis- and trans-mixture) as a fluorous solvent and perfluorinated rareearth metal salts such as Sc(OSO2C8F17)3 or Yb(OSO2C8F17)3 (2.0 mol%) as a catalyst, the Mannich-type reaction of arylaldehydes with aromatic amines and (1-methoxy-2-methylpropenyloxy)trimethylsilane can be performed for many times without reloading the catalyst and the
在本文中,我们描述了在荧光相中有用的曼尼希型反应。通过使用全氟萘烷(C 10 F 18,顺式和反式混合物)作为氟溶剂和全氟化稀土金属盐,例如Sc(OSO 2 C 8 F 17)3或Yb(OSO 2 C 8 F 17)3通过使用(2.0摩尔%)作为催化剂,芳醛与芳族胺和(1-甲氧基-2-甲基丙烯氧基)三甲基硅烷的曼尼希型反应可以进行多次,而无需重新装载催化剂和氟溶剂。
Mannich‐Type Reaction Catalyzed by Silica‐Supported Fluoroboric Acid under Solvent‐Free Conditions
作者:WeiYi Chen、XinSheng Li、Jun Lu
DOI:10.1080/00397910701796766
日期:2008.1.1
Abstract Three‐component Mannich‐typereaction of aldehydes, aromatic amines, and silyl enolate proceeded smoothly to afford β‐amino carbonyl compounds with good yields in the presence of a catalytic amount of HBF4‐SiO2.