Tandem Michael addition of amines to maleic anhydride and 1,3-prototropic shift: experimental and theoretical results
摘要:
Amines, namely diethylamine, diphenylamine, benzylamine, and pyrrolidine react with maleic anhydride to form Michael adducts. The Michael adducts formed with the first three amines undergo tandem 1,3-prototropic shift to give the final products. Computational calculations at the DFT (B3LYP/6-31+G*) level reveal that a reactant-complex formed between the initially formed Michael adduct and the respective amine plays a crucial role in the 1,3-prototropic shift. In the reaction of pyrrolidine with maleic anhydride, Michael addition is not followed by 1,3-prototropic shift. The theoretical studies of the latter reaction show that a reactant-complex is not formed in this case. Dimethyl maleate and dimethyl fumarate react with pyrrolidine to give the same Michael addition product. (C) 2014 Elsevier Ltd. All rights reserved.
NITROGEN CONTAINING HYDROFLUOROETHERS AND METHODS OF MAKING SAME
申请人:3M INNOVATIVE PROPERTIES COMPANY
公开号:US20160145195A1
公开(公告)日:2016-05-26
Provided are amine-containing hydrofluoroether compounds represented by the following general formula (I), wherein (I) Y is a single bond or CF2 and wherein (i) Rf.1 and Rf2 are independently linear or branched perfluoroalkyl groups having with 1-8 carbon atoms and optionally comprise at least one catenated heteroatom, or (ii) Rf1 and Rf2 are bonded together to form a ring structure having 4-6 carbon atoms and optionally comprise one or more catenated heteroatoms; with the proviso that if Rf1 and Rf2 are bonded together to form a ring structure comprising a nitrogen heteroatom, said nitrogen heteroatom is tertiary and is bonded to a perfluoroalkyl group having 1-3 carbon atoms.
Ancos, B. de; Farina, F.; Maestro, M. C., Anales de Quimica, 1995, vol. 91, # 1.2, p. 132 - 141
作者:Ancos, B. de、Farina, F.、Maestro, M. C.、Martin, M. R.
DOI:——
日期:——
Nonconvergent cycloaddition pathways for thermal vs. photochemical reaction of N-isobutenylpyrrolidine with dimethyl fumarate
作者:Frederick D. Lewis、Tong-Ing Ho、Robert J. DeVoe
DOI:10.1021/jo01314a011
日期:1980.12
US9540316B2
申请人:——
公开号:US9540316B2
公开(公告)日:2017-01-10
[EN] NITROGEN CONTAINING HYDROFLUOROETHERS AND METHODS OF MAKING SAME<br/>[FR] HYDROFLUOROÉTHERS CONTENANT DE L'AZOTE ET PROCÉDÉS POUR LEUR PRÉPARATION
申请人:3M INNOVATIVE PROPERTIES CO
公开号:WO2015013155A1
公开(公告)日:2015-01-29
Provided are amine-containing hydrofluoroether compounds represented by the following general formula (I), wherein (I) Y is a single bond or CF2 and wherein (i) Rf.1 and Rf2 are independently linear or branched perfluoroalkyl groups having with 1-8 carbon atoms and optionally comprise at least one catenated heteroatom, or (ii) Rf1 and Rf2 are bonded together to form a ring structure having 4-6 carbon atoms and optionally comprise one or more catenated heteroatoms; with the proviso that if Rf1 and Rf2 are bonded together to form a ring structure comprising a nitrogen heteroatom, said nitrogen heteroatom is tertiary and is bonded to a perfluoroalkyl group having 1-3 carbon atoms.