Aerobic oxidative coupling of alcohols and amines towards imine formation by a dicopper(I,I) catalyst
作者:Indranil Dutta、Subhabrata De、Sudhir Yadav、Ranajit Mondol、Jitendra K. Bera
DOI:10.1016/j.jorganchem.2017.05.009
日期:2017.11
A dicopper(I,I) complex [Cu2(L1) (Cl)2] (1), bearing a Cu2Cl2 core spanned by a naphthyridine–diimine ligand is synthesized by the treatment of CuCl with 2,7–bis(N–mesitylmethylimino)–1,8–naphthyridine (L1). The catalytic efficacy of 1 is assessed for aerobic oxidative synthesis of imines from alcohols and amines. The title complex is found to be an excellent catalyst for a wide variety of alcohols
Nucleophilic Trifluoromethylation of Imines under Acidic Conditions
作者:Vitalij V. Levin、Alexander D. Dilman、Pavel A. Belyakov、Marina I. Struchkova、Vladimir A. Tartakovsky
DOI:10.1002/ejoc.200800820
日期:2008.11
A general method for the trifluoromethylation of imines by using Me3SiCF3 under acidic conditions is described. The reaction is promoted by hydrofluoric acid generated in situ from KHF2 and either TFA or TfOH. A new chemoselectivity pattern was achieved, as the C=N bond was found to be more reactivate than the carbonyl group. The trifluoromethylation reaction is believed to proceed by concerted transfer
C,H bond activation of imino substituted heterocycles: synthesis and crystal structure of and the isomeric clusters
作者:Wolfgang Imhof
DOI:10.1016/s0022-328x(96)06824-6
日期:1997.4
The analogous reaction with imines of thiophene-3-carbaldehyde or indole-3-carbaldehyde yields the corresponding isomeric clusters . The reaction proceeds via activation of the C,Hbond in β-position relative to the exocyclic C,N double bond of the imine ligands. A 1,3 hydrogen shift reaction then leads to the formation of a methylene group instead of the former imine carbon atom. So, the imine ligands
Fe 2(CO)9与衍生自噻吩-2-甲醛或N-甲基-吡咯-2-甲醛的杂环亚胺反应生成双核化合物。与噻吩-3-甲醛或吲哚-3-甲醛的亚胺类似的反应产生相应的异构簇。该反应通过相对于亚胺配体的环外C,N双键在β-位的C,H键活化而进行。然后发生1,3氢转移反应,导致形成亚甲基,而不是前一个亚胺碳原子。因此,配体亚胺被转化为μ 2 -η 3 -烯基酰氨基配体配位到一种Fe 2(CO)6 通过对六种化合物的X射线结构分析证实了这一点。
Generation and Trapping of a 1-Phosphafulvene: An Illustration of the P═C/C═C Analogy
As electron-rich partners, they act as 4π phosphadienic systems toward alkenes and alkynes in [4 + 2] cycloaddition reactions. As electron-poor partners, they act either as 2π systems toward conjugated dienes in [2 + 4] cycloaddition reactions via their P═C double bond or as 6π systems toward phosphadienes in [6 + 4] cycloaddition reactions.
Phospholes react with aldimines at 170 degrees C in the presence of mild Lewis acids to give C-2-bridged biphospholes in good yields: The mechanism includes a series of [1,5] shifts of the P-substituents around the phosphole ring, a P-H + aldimine condensation, and the formation of a transient three-membered ring that dimerizes.