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
Michael additions to 3(2H)-thiophenone 1,1-dioxide
作者:Nini Hofsløkken、Solveig Flock、Lars Skattebøl
DOI:10.1016/0040-4039(95)02088-8
日期:1996.1
The addition of thiols and amines to 3(2H)thiophenone 1,1-dioxide takes place with extrusion of sulfur dioxide,furnishing in high yields the corresponding vinyl sulfides and enamines. Addition of dithiols afforded the corresponding thioacetals. The rates of the the Michaeladdition and the extrusion reaction are strongly influenced by the solvent employed. In ethanol, sulfur dioxide extrusion took
Hofslokkcn, Nini Unn; Skattebol, Lars, Journal of the Chemical Society. Perkin transactions I, 1999, # 21, p. 3085 - 3088
作者:Hofslokkcn, Nini Unn、Skattebol, Lars
DOI:——
日期:——
Organic synthesis with α-chlorosulphides. Convenient routes to phenylthioacetals from α-diazoketones and alkyl phenyl sulphides via α-chlorosulphides
作者:John P. Cronin、Brid M. Dilworth、M. Anthony McKervey
DOI:10.1016/s0040-4039(00)84093-9
日期:1986.1
Dynamic Thiol Exchange with β-Sulfido-α,β-Unsaturated Carbonyl Compounds and Dithianes
作者:Gururaj Joshi、Eric V. Anslyn
DOI:10.1021/ol301781u
日期:2012.9.21
A reversible covalent bond exchange of thiols, beta-sulfido-alpha,beta-unsaturated carbonyls, and dithianes has been studied in DMSO and D2P/DMSO mixtures. The equilibrium between thiols and beta-sulfido-alpha,beta-unsaturated carbonyls is obtained within a few hours, while the equilibration starting with the beta-dithiane carbonyls and thiols requires a few days. This time scale makes the system ideal for utilization in dynamic combinatorial chemistry.