The Mechanism of Alkene Elimination from Protonated Toluenesulphonamides Generated by Electrospray Ionisation
作者:Amie Saidykhan、Jenessa Ebert、William H.C. Martin、Richard T. Gallagher、Richard D. Bowen
DOI:10.1255/ejms.1427
日期:2016.8
The positive ion electrospray massspectra of a range of sulphonamides of general structure CH3C6H4SO2NHR1 [R1 = C n H2n+1 (n = 1–7), C n H2n-1 (n = 3, 4), C6H5, C6H5CH2 and C6H5CH(CH3)] and CH3C6H4SO2NR1R2 [R1, R2 = C n H2n+1 (n = 1–8)] are reported and discussed. The protonated sulphonamides derived from saturated primary and secondary aliphatic amines generally fragment to only a limited extent
一系列一般结构为 CH3C6H4SO2NHR1 [R1 = C n H2n+1 (n = 1–7), C n H2n-1 (n = 3, 4), C6H5, C6H5CH2 和 C6H5CH( CH3)] 和 CH3C6H4SO2NR1R2 [R1, R2 = C n H2n+1 (n = 1–8)] 进行了报道和讨论。除非通过碰撞激发能量,否则衍生自饱和脂肪族伯胺和仲胺的质子化磺酰胺通常仅在有限程度上碎裂。观察到两种一般的断裂:首先,消除烯烃,C n H2n,通过从氮上的 C n H2n+1 烷基之一夺氢获得;其次,裂解形成 CH3C6H4SO2+。通过研究 [M + H – C n H2n]+ 信号强度随氮上烷基取代基结构的变化,以及监测与从质子化的不对称磺酰胺中丢失不同的烯烃,其中两个不同的烷基与氮相连。这种断裂有利于烷基在直接连接到氮的碳原子上的支化,因此表明它涉及一种机制,其中通
Reaction of activated 2,2-dimethylaziridines with Grignardreagents RMgHal in boiling THF can yield the products of normal aziridine ring opening, the rearranged opening products , and the methallylamides (isomers of ). The product distribution depends on R, Hal, and experimental conditions, and very strongly on the nature of the activating group A. It is shown that is opened (reversibly for A = sulfonyl)
申请人:Sanford Burnham Prebys Medical Discovery Institute
公开号:US11155525B2
公开(公告)日:2021-10-26
The present invention relates to a novel azole derivative as an apelin receptor agonist and a method for treating cardiovascular disease, diabetic disease, renal disease, hypertension, and arteriosclerosis, etc., using the same. The present invention provides a compound represented by formula (I) or a pharmacologically acceptable salt thereof wherein X1 represents —N═ or —CH═, X2 represents —CH═ or —N═, R1 and R2 each represent a C1 to C6 alkoxy group or the like, R3 represents a heteroaryl group (the heteroaryl group is optionally substituted by a methyl group or the like) or the like, and R4 represents a C1 to C6 alkylthio group or a C2 to C6 alkenyl group (the C1 to C6 alkylthio group and the C2 to C6 alkenyl group are each optionally substituted by one carboxy group or the like) or the like.
N-Alkylation of sulfonamides using cyclic ethers as alkylation reagents and Bronsted acid as a catalyst produced pyrrolidine and piperidine derivatives in good yields. When using symmetrical and unsymmetrical ethers as alkylation reagents, mono-N-allcylation of sulfonamides took place to afford the corresponding products. (C) 2013 Elsevier Ltd. All rights reserved.