H<sub>3</sub>PW<sub>12</sub>O<sub>40</sub>as a Useful Recyclable Heterogeneous Catalyst for the Facile and Highly Efficient Michael Addition Reaction of Thiols to α,β-Unsaturated Ketones
作者:Habib Firouzabadi、Nasser Iranpoor、Abbas Ali Jafari
DOI:10.1055/s-2004-837212
日期:——
Solid H 3 PW 1 2 O 4 0 is easily used as a heterogeneous, reusable and efficient catalyst (1 mol%) for the selective addition of thiols and dithiols to α,β-unsaturated ketones in MeCN to afford the corresponding Michael adducts in excellent yields at room temperature.
固体 H 3 PW 1 2 O 4 0 很容易用作多相、可重复使用和高效的催化剂 (1 mol%),用于将硫醇和二硫醇选择性加成到 MeCN 中的 α,β-不饱和酮,以优异的性能提供相应的迈克尔加合物在室温下产生。
Micellar Solution of Sodium Dodecyl Sulfate (SDS) Catalyzes Facile Michael Addition of Amines and Thiols to ?,?-Unsaturated Ketones in Water under Neutral Conditions
作者:H. Firouzabadi、N. Iranpoor、A.?A. Jafari
DOI:10.1002/adsc.200404348
日期:2005.4
Sodiumdodecylsulfate (SDS) catalyzesfacileMichaeladditions of amines and thiols to α,β-unsaturated ketonesunderneutralmicellarconditions to afford the corresponding Michael adducts in good to high yields.
Ceric ammonium nitrate (CAN) as a green and highly efficient promoter for the 1,4-addition of thiols and benzeneselenol to α,β-unsaturated ketones
作者:Cheng-Ming Chu、Shijay Gao、M.N.V. Sastry、Chun-Wei Kuo、Chaowei Lu、Ju-Tsung Liu、Ching-Fa Yao
DOI:10.1016/j.tet.2006.12.018
日期:2007.2
efficient process for the 1,4-addition of thiols and benzeneselenols to various α,β-unsaturatedketones using a catalytic amount of CAN with excellent product yields is described. This inexpensive, nontoxic, and readily available catalytic ceric(IV) ammonium nitrate system efficiently catalyzes conjugate addition reactions between thiol derivatives and various α,β-unsaturatedketones under solvent-free conditions
An environmentally benign and highly efficient supramolecular Michael addition of thiols from the secondary side of beta-cyclodextrin to alpha,beta-unsaturated compounds at the primary side in water is described in quantitative yields; products of undesirable side reactions resulting from polymerization are not observed; the use of cyclodextrin precludes the use of either acid or base and the catalyst
Iodine-catalyzed Michael addition of mercaptans to α,β-unsaturated ketones under solvent-free conditions
作者:Cheng-Ming Chu、Shijay Gao、M.N.V. Sastry、Ching-Fa Yao
DOI:10.1016/j.tetlet.2005.05.099
日期:2005.7
A simple and efficient method for the Michael reaction between various mercaptans and α,β-unsaturated ketones using a catalytic amount of iodine (5 mol %) to generate the 1,4-adduct has been reported. The significant features of the iodine catalyzed Michael addition are (a) operational simplicity, (b) inexpensive reagents, (c) high yields of products, (d) the use of relatively low or nontoxic reagents