Convenient one-pot synthesis of vinylic sulfides from thioalkynes via a catalytic hydroboration-coupling sequence
摘要:
A variety of vinylic sulfides are stereospecifically synthesized by the catalytic hydroboration of thioacetylenes with catecholborane followed by cross-coupling of the resulting boron derivatives with organic halides. The use of the same palladium catalyst for both stages allows the whole transformation to be carried out in one flask. The synthetic utility of the method is demonstrated by the transformation of vinylic sulfides into diene, indole, and naphtho[b]furan derivatives.
Indium(I) Iodide Promoted Cleavage of Diphenyl Diselenide and Disulfide and Subsequent Palladium(0)-Catalyzed Condensation with Vinylic Bromides. A Simple One-Pot Synthesis of Vinylic Selenides and Sulfides
作者:Brindaban C. Ranu、Kalicharan Chattopadhyay、Subhash Banerjee
DOI:10.1021/jo052087i
日期:2006.1.1
a variety of substituted vinyl bromides in the presence of a catalytic amount of tetrakis(triphenylphosphine)palladium(0) [Pd(PPh3)4] in THF at room temperature to produce vinylic selenides and sulfides in good yields. The conversion of (E)-vinyl bromides is remarkably stereoselective giving (E)-vinyl selenides (and sulpfides) whereas the stereoselectivity in reaction of (Z)-vinyl bromides is not very
Carbon Dioxide Mediated Stereoselective Copper-Catalyzed Reductive Coupling of Alkynes and Thiols
作者:Siti Nurhanna Riduan、Jackie Y. Ying、Yugen Zhang
DOI:10.1021/ol3003699
日期:2012.4.6
A simple protocol for the stereoselective copper-catalyzed hydrothiolation of alkynes under a CO2 atmosphere has been developed. The stereoselectivity is determined by the presence/absence of a CO2 atmosphere. The reaction system is robust and utilizes inexpensive, readily available substrates. A cyclic alkene/carboxylate copper complex intermediate is proposed as the key step in determining the stereoselectivity
Straightforward and highly efficient catalyst-free regioselective reaction of thiol to β-nitrostyrene: a concise synthesis of vinyl sulfide and nitro sulfide
作者:Cheng-Ming Chu、Zhijay Tu、Pohsi Wu、Chieh-Chieh Wang、Ju-Tsung Liu、Chun-Wei Kuo、Yu-Hsuan Shin、Ching-Fa Yao
DOI:10.1016/j.tet.2009.02.074
日期:2009.5
Under catalyst-free reaction conditions, solvent-mediated addition of thiol 2 to β-nitrostyrene 1 proceeded with regioselective control to afford either adduct 3 or vinylsulfide 4 in good to excellent yield. Thermodynamic and autocatalytic reaction mechanisms were proposed to rationalize the products thus formed.