CeCl3路7H2O-NaI/SiO2 system promoted Beckmann rearrangement of a variety of aldoximes and ketoximes was efficiently conducted under solvent-free and microwave irradiation conditions. This protocol afforded an alternative method for the preparation of amides by Beckmann rearrangement with advantages of ...
通过研究,我们发现CeCl3"7H20.NaI能较好的促进反应的进行,进而,本论文在第一部分主要对CeCl3"7I-120.NaI催化氨基苯硫酚与高位阻a 13.不饱和酮的迈克尔加成反应进行了系统的研究。首先,通过模型反应,围绕催化剂、溶剂以及催化剂用量等方面对迈克尔加成反应展开系统的研究,研究发现,CeCl3"7H20.NaI能够催化邻氨基苯...
为了进一步研究催化剂CeCl3·7H2O-NaI对此类迈克尔加成反应的普适性,本论文对15个高位阻α,β-不饱和酮(5a~5o)与邻氨基苯硫酚的反应进行扩展研究,研究表明,CeCl3·7H2O-NaI不但能够催化邻氨基/对氯邻氨基苯硫酚与高位阻α,β-不饱和酮(5a~5o)的迈克尔加成反应,而且在相对较短的时间内能够得到较高的产率。
CeCl 3 ·7H 2 O–NaI catalyzed intramolecular addition reactions of 7-hydroxy-1,3-dienes: a facile approach to hexahydrobenzofurans and tetrahydrofurans[J] . Ming-Chang P. Yeh,Wei-Jou Yeh,Ling-Hsien Tu,Jia-Ru Wu.Tetrahedron . 2006 (31)...
因此,本文研究了在迈克尔加成-缩合串联反应中复合型催化剂CeCl3·7H2O-NaI的催化效应,并研究了该催化剂的普适性和重复性。 1、研究了迈克尔加成-缩合串联反应的最佳反应条件 以2-氨基苯硫酚和α,β-不饱和酮5c的反应为模型,从催化剂、溶剂、反应时间、催化剂用量、NaI用量、SiO2用量六个方面对迈克尔加成-缩合...
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d-Glycals readily undergo cyclization with aryl amines in the presence of CeCl3·7H2O–NaI under mild and neutral conditions to afford a novel sugar derived tetrahydroquinoline derivatives in good yields with high stereoselectivity. The stereochemistry of the products was assigned by using various NMR...
CeCl3·7H2O-NaI催化氨基苯硫酚与α,β-不饱和酮的迈克匀加成—缩合串联反应研究 CeCl3·7H2O可以高效地催化迈克尔加成反应,形成碳碳键,碳氧键和碳氮键等,但鲜有文献报道其可以有效催化硫-迈克尔加成反应及氨基与羰基的缩合反应。 本课题组在合成3-... 高丽叶 - 河北师范大学 被引量: 0发表: 0年 七水合...
CeCl(3) x 7H(2)O-NaI catalyzed hydrooxacyclization of unsaturated 3-hydroxy esters. Marotta Emanuela,Foresti Elisabetta,Marcelli Tommaso,Peri Francesca,Righi Paolo,Scardovi Noemi,Rosini Goffredo. Organic Letters . 2002E. Marotta,E. Foresti,G. Rosini, et al.CeCl3.7H2O—NaI catalyzed hydrooxa...
d-Glycals react smoothly with a variety of alcohols in a highly stereoselective manner in the presence of the CeCl3·7H2O–NaI reagent system in refluxing acetonitrile under neutral conditions to afford the corresponding 2-deoxy-α-glycopyranosides in high yields. In the absence of NaI, the gl...