Suzuki‐Miyaura coupling of haloarenes is the most widely used protocol for the synthesis of biphenyls. Organosulfur compounds are promising electrophiles since they are abundant in nature and versatile in organic synthesis. We report here the desulfinylative Suzuki‐Miyaura coupling of aryl sulfoxides with phenylboronic acids using bench‐stable nickel/5‐(2,4,6‐triisopropylphenyl)imidazolylidene[1,5‐a]pyridines
卤代芳烃的Suzuki-Miyaura偶联是联苯合成中使用最广泛的方案。有机硫化合物是有前途的亲电子试剂,因为它们性质丰富且有机合成用途广泛。我们在此报告使用稳定的镍/ 5-(2,4,6-三异丙基苯基)咪唑基亚甲基[1,5- a ]吡啶作为催化剂将芳基亚砜与苯基硼酸的脱亚磺酰基铃木-宫浦偶合。配体易于从常见的商业化学品制备。该方法适用于对称和不对称的芳基亚砜,并且以高达94%的收率获得了一系列带有各种官能团的联苯。
Highly Rapid and Direct Synthesis of Diaryl Sulfoxides
作者:B. P. Bandgar、S. N. Kinkar、V. T. Kamble、S. V. Bettigeri
DOI:10.1055/s-2003-41461
日期:——
Aromatic compounds react smoothly with thionyl chloride in the presence of 10 mol% of water at ambient temperature to afford the corresponding symmetrical diaryl sulfoxides in good to excellent yields with high regioselectivity.
Trifluoromethanesulfonic Acid Catalyzed Preparation of Symmetrical Diaryl Sulfoxides from Arenes and Thionyl Chloride
作者:George A. Olah、Eric R. Marinez、G. K. Surya Prakash
DOI:10.1055/s-1999-2861
日期:1999.9
The preparation of symmetrical diaryl sulfoxides from thionyl chloride and arenes catalyzed by trifluoromethanesulfonic acid is described. The reaction is characterized by its mildness, high yields, selectivity, and ease of workup.
The direct cross-couplings of diaryl sulfoxides with aryl bromides via C–S bond cleavage could be readily accomplished using nickel(II) as the catalyst, 1,2-bis(diphenylphosphino)ethane (dppe) as the ligand, and magnesium turnings as the reducing metal in THF, leading to the corresponding biaryls in moderate to good yields. The reaction exhibited a broad substrate scope and could be applied to a gram-scale