Thiene oxides

The trapping of both sulfines and sulfenes with dienes is probably the method of choice for the preparation of 3-thiene oxides and dioxides, respectively143,337. 

Thiazepinones, as photolytic products 883 Thiazine 1-oxides, synthesis of 323, 352 Thiene dioxides formula of 382 synthesis of 469 Thiene oxides formula of 382 synthesis of 469... 

P, y-Unsaturated sulfoxides (e.g. 3-thiene oxides) can be prepared by trapping of the in Situ-generated 349 with dienes in a Diels-Alder-type reaction (equation 127) . 

The lithiated 2-(thien-3-yl)quinoxaline (202) gave a mixture of linear di- and polyadducts that were immediately oxidized to a separable mixture of... 

Chloro-2-(A(-methyIhydrazino)quinoxaline 4-oxide gave 6-chloro-2-[A( -(fur-2-ylmethylene)-A(-methyIhydrazino]- (232, X = O) (2-furaldehyde, dioxane, reflux, 1 h >95%)" or 6-chloro-2-[A(-methyl-A( -(thien-2-ylmethylene) hydrazinojquinoxahne 4-oxide (232, X = S) (2-thiophenecarbaldehyde, dioxane, reflux, 1 h 91%). ... 

Chloro-2-[A -methyl-Af -(thien-2-ylmethylene)hydrazino]quinoxaline 4-oxide (288, R = H) with 2-chloroacrylonitrile gave 8-chloro-4-hydroxy-l-methyl-... 

The unavailability of suitable starting materials has hindered work in this area, but the reaction of cyclopentadienylindium(I) in Et20/benzene mixtures with 4,4,4-trifiuoro-l-(thien-2 -yl)butane-l,3-dionate (ttaH) gave the extremely hygroscopic In(tta), and similar derivatives of other bidentate ligands were obtained by this same process.14 The reactions of the analogous In(oxine) (oxine = 8-hydroxyquinoline anion) show that such InL species are easily oxidized to indium(III) complexes (see Section 25.2.4.8). The insolubility of the product in the reaction mixture is presumably an important factor in this method. 

Bethoxazin (3-benzo(b)thien-2-yl-5,6-dihydro-l,4,2-oxathiazine 4-oxide)... 

The conducting and physical properties can be modified by the use of 3- and/or 4-substitutents, or A -substituents in the case of pyrrole. The counterions can be incorporated into a side-chain (self-doping) as in the polymer of 3-(thien-3-yl)propanesulfonic acid. Variation in the size of side-chains allows control of solubility. Mixed polymers with, for example, thiophenes and pyridines, are capable of both oxidative and reductive doping. 

Various Reactions of the Side-chain.—4,5,6,7-Tetrahydrobenzo[6]thien-4-yl-urea was oxidized to the 7-oxo-derivative by ceric ammonium nitrate the... 

Bhatia S, Thien C Y and Mohamed A R (2009), Oxidative coupling of methane (OCM) in a catalytic membrane reactor and comparison of its performance with other catal5rtic reactors , Chem EngJ, 148,525-532. 

The electrochemical oxidation of 17p-estradiol—a steroid that causes abnormal thyroid function in birds and fish—was obtained with copper meso-tetra(thien-2-yl)porphyrin/RGO hybrid [126]. 

Bhatia, S., Thien, C. and Mohamed, A. (2009). Oxidative Coupling of Methane (OCM) in a Catalytic Membrane Reactor and Comparison of its Performance with Other Catalytic Reactors, Chem. Eng. J., 148, pp. 525-532. 

In this way, ethyl esters 94 of thien-2-yIacetic acids were formed (Scheme 147) [210]. The presence of oxidant Fe2(S04)3 H20 was necessary for the oxidation of the intermediate o-complex and thus for reaction progress (Scheme 147) [210]. 

S-Oxidation of a di(thien-3-yl)methane provided a mixture of the mono 5-oxide 4 and the double 5-oxide 5, in a ratio that depended on the number of equivalents of m-CPBA used (Scheme 5) [15]. 

Scheme 5 Oxidation of a di(thien-3-yl)methane hy m-CPBA in the presence of BF3 Et20 [15]...

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