629-19-6Relevant articles and documents
Nucleophile-induced intramolecular dipole 1,5-transfer and 1,6-cyclization: Experimental and ab initio studies of formation, thermolysis, and molecular and electronic structures of 3,6-diphenyl-1-propanesulfenimido-1,2,4,5-tetrazine
Kaszynski, Piotr,Young Jr., Victor G.
, p. 2087 - 2095 (2000)
Reaction of dichlorobenzaldazine (2) with sodium azide followed by 1-propanethiol/Et3N furnished tetrazine ylide 1 as the main product. The structure of this unprecedented ylide was confirmed with single-crystal X-ray analysis [C17H17N5S, monoclinic P21/n a = 6.8294(4) A, b = 13.6781(9) A, c = 17.5898(12) A, β = 90.666(1)°, Z = 4] and favorably compared with the results of ab initio calculations. The mechanisms of formation of the ylide and its thermal decomposition to 2,5-diphenyltetrazine (5) were investigated using ab initio methods and correlated with the experimental observations. The results suggest that formation of 1 involves intramolecular cyclization of a nitrile imine and thermolysis of 1 might generate a sulfenylnitrene. The formation of 1 is considered to be the first example of a potentially more general reaction.
Lalancette,Lachance
, p. 859 (1969)
Sunner
, p. 217 (1955)
Substituted o-Aminophenols as Redox-Mediators in the Thiol Oxidation to Unsymmetrical Disulfides
Berberova, Nadezhda T.,Burmistrova, Daria A.,Galustyan, Andrey,Smolyaninov, Ivan V.
, (2021/06/17)
A number of substituted o-aminophenols has been investigated as redox mediators of the thiol oxidation to disulfides. The electrooxidation of o-aminophenols leads to the corresponding o-iminobenzoquinones. These compounds react with thiols in the solution with a formation of disulfides. It was established that the use of 4,6-di-tert-butyl-2-(tert-butylamino)phenol as a redox mediator can reduce the overpotential of the thiol oxidation by 0.2-1.4 V depending on the nature of the coupling thiols. The unsymmetrical disulfides with alkyl, aryl, and heteroaryl substituents were obtained as the result of the indirect electrosynthesis.
METHOD FOR OXIDATION OF SULFUR-CONTAINING COMPOUNDS
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Paragraph 0141-0142, (2021/10/30)
Various embodiments disclosed relate to a method of oxidizing sulfur-containing compounds. The method involves contacting a sulfur-containing compound with a helmet phthalocyaninato-type catalyst in the presence of an oxidant. The present invention also provides a method of removing undesired sulfur-containing compounds from a fluid, such as natural gas, crude oil or an aqueous waste stream.