A novel preparation of sulfilimines from the corresponding sulfoxides using the Burgess reagent is described. The reaction is general to dialkyl- and aryl alkyl sulfoxides and proceeds under mild conditions in benzene. A variety of protecting groups can be introduced on the nitrogen of the sulfilimine by choosing the appropriate Burgess reagent.
New Uses for the Burgess Reagent in Chemical Synthesis: Methods for the Facile and Stereoselective Formation of Sulfamidates, Glycosylamines, and Sulfamides
作者:K. C. Nicolaou、Scott A. Snyder、Deborah A. Longbottom、Annie Z. Nalbandian、Xianhai Huang
DOI:10.1002/chem.200400503
日期:2004.11.19
Although the Burgess reagent (methoxycarbonylsulfamoyltriethylammonium hydroxide, inner salt) has found significant use in chemical synthesis as a dehydrating agent, almost no work has been directed towards its potential in other synthetic applications. As this article will detail, we have found that the Burgess reagent is remarkably effective at accomplishing a number of non-dehydrative synthetic
Design and optimization of quinazoline derivatives as melanin concentrating hormone receptor 1 (MCHR1) antagonists: Part 2
作者:Sanjita Sasmal、D. Balasubrahmanyam、Hariprasada R. Kanna Reddy、Gade Balaji、Gujjary Srinivas、Srisailam Cheera、Chandrasekhar Abbineni、Pradip K. Sasmal、Ish Khanna、V.J. Sebastian、Vikram P. Jadhav、Manvendra P. Singh、Rashmi Talwar、J. Suresh、Dhanya Shashikumar、K. Harinder Reddy、V. Sihorkar、Thomas M. Frimurer、Øystein Rist、Lisbeth Elster、Thomas Högberg
DOI:10.1016/j.bmcl.2012.03.049
日期:2012.5
Melanin concentrating hormone receptor 1 (MCHR1) antagonists have potential for the treatment of obesity and several CNS disorders. In the preceding article, we have described a novel series of quinazolines as MCHR1antagonists and demonstrated in vivo proof of principle with an early lead. Herein we describe the detailed SAR and SPR studies to identify an optimized lead candidate having good efficacy in
黑色素浓缩激素受体 1 (MCHR1) 拮抗剂具有治疗肥胖和多种中枢神经系统疾病的潜力。在上一篇文章中,我们描述了一系列新型喹唑啉作为 MCHR1 拮抗剂,并通过早期先导证明了体内原理证明。在此,我们描述了详细的 SAR 和 SPR 研究,以确定在亚慢性 DIO 模型中具有良好疗效且具有良好心血管安全窗口的优化先导候选药物。
The Synthesis of Alkyl and (Hetero)aryl Sulfonamides From Sulfamoyl Inner Salts
作者:Joseph M. Young、Aisha G. Lee、Ramalakshmi Y. Chandrasekaran、Joseph W. Tucker
DOI:10.1021/acs.joc.5b01287
日期:2015.8.21
An approach to the synthesis of sulfonamides from sulfamoyl inner salts and organometallic species is presented. A range of sulfamoyl carbamates, amines, and metals are explored. Primary, secondary, and tertiaryalkyl-, aryl-, and heteroaryllitihium and magnesium nucleophiles were successful. This approach yields bench-stable intermediates and avoids many of the functional group incompatibilities,
Tritylamine as an Ammonia Surrogate in the Ugi Reaction Provides Access to Unprecedented 5-Sulfamido Oxazoles Using Burgess-type Reagents
作者:Irene Preet Bhela、Marta Serafini、Erika Del Grosso、Gian Cesare Tron、Tracey Pirali
DOI:10.1021/acs.orglett.1c01002
日期:2021.5.7
Starting from a wide range of α-acylamino amide substructures synthesized using tritylamine as an ammonia surrogate in the Ugi reaction, Burgess-typereagents enable cyclodehydration and afford unprecedented oxazole scaffolds with four points of diversity, including a sulfamide moiety in the 5-position. The synthetic procedure employs readily available starting materials and proceeds smoothly under