23901-49-7Relevant academic research and scientific papers
X-ray crystal structures of ethoxycarbonyl-, diethyl-2-triphenyl- λ5-phosphoranylidene-N-phenylimide derivatives
Arsanious, Mona H. N.
experimental part, p. 710 - 713 (2011/04/24)
Phenylisothiocyanate reacts with ethyltriphenylphosphanylideneacetate at room temperature to yield 2-(ethoxycarbonyl)-2-(triphenyl-λ5- phosphanylidene)-N'-phenylethane thioimidic acid and diethyl-2-(triphenyl- λ5-phosphanylidene)-3-(phenylimlno)pentanedioate. The formation of phosphoranes are explained according to mechanism of the Wittig type reaction. The X-ray analysis structures of phosphorane adducts were studied.
Kinetic and mechanistic study on the thermal reactivity of stabilized phosphorus ylides, part 3: [(Acetyl) (arylcarbamoyl)-methylene] triphenylphosphoranes and [(alkoxy-carbonyl) (arylcarbamoyl)-methylene] triphenylphosphoranes and their thiocarbamoyl analogues
Aitken, R. Alan,Al-Awadi, Nouria A.,Dawson, Graham,El-Dusouqui, Osman,Kaul, Kamini,Kumar, Ajith
, p. 6 - 16 (2008/02/12)
A series of five [(acety])(arylcarbabmoyl)methylene]triphenyl-phosphoranes 1a-e and their thiocarbamoyl analogues 2a-e, |(alkoxycarbonyl)(arylcarbamoyl) methylene]triphenylphosphoranes 3a-e and thiocarbamoyl analogues 4a-e were prepared and fully characterized. All ylides are found under conditions of flash vacuum pyrolysis to fragment giving arylisocyanate or isothiocyanate and acetyl ylides or alkoxy ylides which undergo thermal extrusion of Ph3PO. A kinetic study shows that these reactions are unimolecular and are of first-order nature with no significant substituent effect. The thiocarbamoyl ylides 2 react from 4.6 to 42 times faster than their carbamoyl ylides 1, while the thiocarbamoyl ylides 4 react from 6.6 to 20.9 times faster than their carbamoyl ylides 3.
