Monomeric complexes MLnXm, where M = Co2+, Ni2+, Zn2+, Cd2+, Cu2+, Pd2+, Sn4+; L = 1-allenylimidazole, 1-allenyl-2-methylimidazole, 1-allenylbenzimidazole; n = 2, 4; m = 1, 2, 4; X = Cl, OCOCH3, was prepared for the first time, and their structure was studied by NMR and IR spectroscopy. In the complexes, 1-allenylimidazoles act as monodentate ligands, coordinating via the heteroring N-3 atom, and the CH2=C=CH group is stabilized by coordination of the azolyl ring with the metal, which hinders electron transfer from the heteroring to the allenyl fragment. The prospective use of the complexes of Zn(OCOCH3)(2) with 1-allenyl imidazole derivatives as antidotes and antihypoxants was demonstrated.
and simple procedure for the hydroamination of N‐allenylazoles with secondary amines. The reaction proceeds under mild conditions by copper(I) catalysis yielding the corresponding original linear E allylic amines with total regio‐ and stereoselectivity. Density Functional Theory (DFT) calculations offer a mechanistic explanation of the significantly higher reactivity of N‐allenyl‐(1,2)‐azoles compared
Complementary processes promote the N-prop-2-ynylation of heterocycles: solid-liquidphasetransfercatalysiswithout added solvent in the presence or absence of alumina or titanium dioxide and alkylation on ‘basic’ alumina in ‘dry media’.
A simple one-pot preparation of N-allenyl amides, ureas, carbamates and sulfonamides using a DMSO/tBuOK protocol
作者:Thomas W. Bousfield、Marc C. Kimber
DOI:10.1016/j.tetlet.2014.11.093
日期:2015.1
A one-pot transformation of amides, ureas, carbamates and sulfonamides into synthetically useful N-allenyl analogues using a (BuOK)-Bu-t/DMSO protocol is reported. The procedure is experimentally simple and robust, and provides N-allenyl analogues, commonly used within the literature, in yields comparable to the benchmark two-step approach. (C) 2014 Elsevier Ltd. All rights reserved.
Tarasova; Shmidt; Klyba, Russian Journal of Organic Chemistry, 1998, vol. 34, # 5, p. 688 - 692
Synthesis ofN-allenylazoles from azoles and propargyl chloride or 1,2,3-trichloropropane in one preparative step
作者:O. A. Tarasova、E. Yu. Shmidt、L. V. Baikalova、A. I. Mikhaleva、B. A. Trofimov
DOI:10.1007/bf02503782
日期:1997.11
Reactions of imidazole and 1,2,4-triazole with propargyl chloride and its more accessible equivalent, 1,2,3-trichloropropane, in the superbasic KOH-DMSO system have been studied. The reactions afford the corresponding N-allenylazoles in one preparative step.