Cyclizations of Dianions from 2-Imino-1,2-diphenylethanone to Oxazolines, Oxazocines, and Oxazonines
作者:Kailash Nath Mehrotra、Indra Sen Singh、Jalpana Roy
DOI:10.1246/bcsj.58.2399
日期:1985.8
2-diphenylethanone with sodium in ether and subsequent addition of carbon disulfide or ethylchloroformateresulted in the formation of 3,4,5-trisubstituted 4-oxazoline-2-thiones and 2-ones, respectively. 1,4-Oxazonines and 1,4-oxazocines were also synthesised from the reaction of 2-imino-1,2-diphenylethanone with sodium in THF followed by addition of dihaloalkanes.
Diorganyl Diselenides and Iron(III) Chloride Drive the Regio- and Stereoselectivity in the Selenation of Ynamides
作者:Tales A. C. Goulart、Davi Fernando Back、Sidnei Moura E. Silva、Gilson Zeni
DOI:10.1021/acs.joc.0c02480
日期:2021.1.1
ynamides as substrates in the reactions with diorganyl dichalcogenides and iron(III) chloride to give selectively three different types of compounds: E-α-chloro-β-(organoselenyl)enamides, 4-(organochalcogenyl)oxazolones, and vinyl tosylates. The results reveal that the selectivity in the formation of products was obtained by controlling the functional groups directly bonded to the nitrogen atom of the
Ketenimines as intermediates to heterocycles. Part 3. Rearrangement of 3-iminoisoxazolines to 2-imino-oxazolines
作者:Francesco De Sarlo、Antonio Guarna、Paolo Mascagni、Robert Carrié、Pierre Guenot
DOI:10.1039/p19810001367
日期:——
hydroxylamines (2) add to 2-benzoyl-N,2-diphenylvinylideneamine (1) and the adducts are easily dehydrated to give the 3-iminoisoxazolines (4). Compounds (4) with 2-aryl substituents rearrange spontaneously to give the 2-imino-oxazolines (5) or (6), but the 2-methyl derivative is more stable and only rearranges on heating. 2-Imino-3-acylaziridines (8) or (9) are assumed to be the intermediates; the expected