Facile One-Pot Synthesis of Aromatic and Heteroaromatic Sulfonamides
作者:Rina Pandya、Takashi Murashima、Livio Tedeschi、Anthony G. M. Barrett
DOI:10.1021/jo034643j
日期:2003.10.1
A series of arene and heteroarene sulfonamides were prepared in one vessel from aryl and heteroaryl bromides via conversion into the corresponding Grignardreagents using either magnesium or isopropylmagnesium chloride and subsequent reaction with sulfur dioxide, sulfuryl chloride, and an amine.
Short-step and scalable transformations from 2,6-dibromopyridine to 6-bromopyridine-2-sulfonamide by means of halogen-metal exchange and subsequent reaction with sulfuryl chloride followed by amidation are established. Application of the method for the synthesis of various pyridine sulfonamides is also described.
Catalyst-Free Sulfonylation of (Hetero)aryl Iodides with Sodium Dithionite
作者:Yuewen Li、Tong Liu、Guanyinsheng Qiu、Jie Wu
DOI:10.1002/adsc.201801445
日期:2019.3.5
The commercially available and cheap sodium dithionite is used as the source of sulfonyl group for the synthesis of sulfones and sulfonamides from (hetero)aryl iodides under catalyst‐free conditions. During the reaction process, sodiumsulfinates generated in situ are the key intermediate, which can be further converted into diverse sulfones and sulfonamides. This transformation proceeds through a
Heterocyclic pentafluorophenyl sulfonate esters are shelf stable alternatives to the often less stable sulfonyl chlorides. They are easily prepared from thiols and react readily with primary and secondary amines to produce sulfonamides in high yields. (c) 2009 Elsevier Ltd. All rights reserved.
Directed <i>ortho</i>-Metalation–Cross-Coupling Strategies. One-Pot Suzuki Reaction to Biaryl and Heterobiaryl Sulfonamides
作者:Cédric Schneider、Ellen Broda、Victor Snieckus
DOI:10.1021/ol201175g
日期:2011.7.15
A general synthesis of stable ortho-boropinacolato aryl and heteroaryl sulfonamides by directed ortho-metalation (DoM) and either MeOBPin or i-PrOBpin electrophile quench, 3 -> 4, is described. A one-pot metalation-Suzuki cross-coupling procedure for the synthesis of biaryis and heteroblaryls, 3 -> 5, and a complementary DoM-Ir-catalyzed boronation sequence (Scheme 6) are delineated.