- Reactions with Hydrazonoyl Halides. Part 10. Formation of Thiohydrazide, Hydrazonoyl Sulfide and Arylazothiazole Derivatives
-
Hydrazonoyl halides react with α-thiocarbamoylcinnamonitrile derivatives, under alkaline conditions, to afford thiohydrazide (4), hydrazonoyl sulfide (7a,b) or arylazothiazole derivatives (9a,b), depending on the nature of the hydrazonoyl halide; a sequence leading to the formation of these products is discussed.
- Abdelhamid, Abdou O.,Zohdi, Hussein F.,Rateb, Nora M.
-
p. 144 - 145
(2007/10/03)
-
- Thiadiazoles and Thiadiazolines. Part 1. Reaction of Thiourea and Ethylenethiourea with Chlorodiazabutadienes: a New Route to 4-Amidino-1,3,4-thiadiazolines
-
1-Chloro-1,4-diaryldiazabutadienes (1) react with thiourea to give hydrochlorides of 4-amidino-2,5-diaryl-Δ2-1,3,4-thiadiazolines from which the corresponding free bases (2) are obtained by treatment with cold alkali.Imidazolidine-2-thione (ethylenethiourea) reacts similarly with the chlorodiazabutadienes (1a,b) to give, after treatment with cold alkali, 4-(4,5-dihydroimidazolin-2-yl)-2,5-diaryl-Δ2-1,3,4-thiadiazolines (6a,b).In the presence of an excess of sodium borohydride the reaction of (1a) with thiourea yielded some N2-benzylthiobenzoylhydrazine (12), compatible with the capture of an intermediate iminium ion.A mechanism is suggested for these reactions.
- Askari, Syed H.,Moss, Stephen F.,Taylor, David R.
-
p. 360 - 365
(2007/10/02)
-
- Studies on Organophosphorus Compounds. XXXIV. Syntheses of 2,3-Dihydro-1,3,4,2-Thiadiazaphospholes and Thiohydrazides
-
N'-Substituted hydrazides, 2, react with 2,4-bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane-2,4-disulfide, 1, in refluxing benzene to give 2,3-dihydro-1,3,4,2-thiadizaphospholes, 3; in one case also the thiohydrazide, 4e, was isolated.Benzohydrazide, 10
- El-Barbary, A. A.,Scheibye, S.,Lawesson, S.-O.,Fritz, H.
-
p. 597 - 602
(2007/10/02)
-