- PRODUCTION METHOD FOR 1,2,3,5,6-PENTATHIEPANE
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The present invention enables provision of a production method for 1,2,3,5,6-pentathiepane, the method comprising, in the following order, step A for reacting a trithiocarbonate, sulfur, and a methane dihalide together using a phase-transfer catalyst in a multilayer system having a water layer and an organic layer, step B for separating the water layer from the organic layer, and step C for stopping the reaction using an acid.
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Paragraph 0056; 0058; 0060; 0061
(2021/01/25)
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- COMPOSITION FOR OPTICAL MATERIAL AND OPTICAL MATERIAL USING THE SAME
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The present invention provides a composition for an optical material containing a ring compound (a) represented by formula (1), an episulfide compound (b), and sulfur (c), wherein the content of the ring compound (a) in the composition for an optical material is in the range of 5-70 mass %, the content of the episulfide compound (b) is in the range of 20-90 mass %, and the content of the sulfur (c) is in the range of 1-39 mass %. (In the formula, X represents S, Se or Te. a to f=0 to 3, 8≥(a+c+e)≥1, 8≥(b+d+f)≥2, and (b+d+f)≥(a+c+e).) This composition for an optical material has a high refractive index as an optical characteristic, and has sufficient heat resistance and good mold release characteristics.
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Paragraph 0095-0099
(2018/05/24)
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- METHOD FOR PRODUCING 1,2,3,5,6-PENTATHIEPANE
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PROBLEM TO BE SOLVED: To provide a method for easily producing high-purity 1,2,3,5,6-pentathiepane. SOLUTION: A method for producing 1,2,3,5,6-pentathiepane comprises a step of causing a reaction of a trithiocarbonate, sulfur and dihalogenated methane in a multilayer system including an aqueous layer and an organic layer in the presence of a phase transfer catalyst. SELECTED DRAWING: None COPYRIGHT: (C)2018,JPOandINPIT
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Paragraph 0026; 0027; 0028; 0029; 0030
(2018/09/25)
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- Organic Heterocyclothiazenes. Part 13. Rotational Synthesis and Chemistry of 1,3,5,2,4-Trithiadiazines
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1,3,5,2,4-Trithiadiazines, previously formed from tetrasulphur tetranitride and diazoalkanes, are synthesised from 1,1-bis-sulphenyl chlorides (1; R = H, Cl), (5), (11) and bis(trimethylsilyl)sulphurdiimide (2), and this reaction extends to trithiadiazines with functional groups on carbon.Bis-sulphenyl chlorides (5a-d) are formed in one step from malonic esters and amides and sulphur dichloride.Pentathiepane (lenthionine) (14), prepared from di-iodomethane and disodium disulphide, gives methanebis(sulphenyl chloride) on chlorinolysis and hence, with (2), the parenttrithiadiazine (3; R = H).Similarly the pentathiepane (16) is converted into bis-sulphenyl chloride (11) and the spirotrithiadiazine (12).The sensitivity of the heterocyclic ring towards strongly polar reagents precluded the generation of the trithiadiazine cation (17) and anion (19), but the radical (18) is formed on treatment with benzoyl peroxide and benzoyl t-butyl nitroxide (22), resulting in the benzoyloxy and amino-oxy derivatives (21) and (24). m-Chloroperbenzoic acid or nitrogen tetroxide convert trithiadiazine into the S-oxide (25).
- Bannister, Robin M.,Rees, Charles W.
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p. 509 - 514
(2007/10/02)
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- A Novel Method for the Generation of Thial S-Sulfides from 2,4,6-Trisubstituted 5,6-Dihydro-1,3,5-dithiazines
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Treatment of 2,4,6-trisubstituted 5,6-dihydro-1,3,5-dithiazines with NCS or NBS afforded highly reactive thial S-sulfides, which underwent dimerization to give the corresponding 1,2,4,5-tetrathianes.The products were also selectively converted into naturally-occurring cyclic polysulfides, 1,2,4-trithiolanes and 1,2,3,5,6-pentathiepanes, by treatment with Ph3P, KCN, or Na2S4.
- Takikawa, Yuji,Makabe, Takahiro,Hirose, Naoyuki,Hiratsuka, Takamichi,Takoh, Ryuji,Shimada, Kazuaki
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p. 1517 - 1520
(2007/10/02)
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- SYNTHESIS, STRUCTURE, AND REACTIONS OF THIOCARBONIC ACID DERIVATIVES NEW PENTATHIODIPERCARBONATES, (RSS)2C=S, α,α,α-TRIS(DISULFIDES), AND THE FIRST α,α,α-TRIS(TRISULFIDE)
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Novel bis(perhaloalkyl) pentathiodipercarbonates 5b-d have been synthesised by reaction of sulfenyl chlorides with metal trithiocarbonates, and the heptathio analog 21a was prepared similarly.Lenthionine 19 is the main product when diiodomethane is treated with sodium tetrathiopercarbonate.A rearrangement of bis(alkyltrithio)dichloromethanes 24 has been observed.Additions of sulfenyl chlorides and of thiosulfenyl chlorides to the thiocarbonyl compounds 5 and 21a were achieved in acetonitrile.The structures of the first crystalline pentathiodipercarbonate 5a and α,α,α-tris(disulfide) 29a, and of the first reported α,α,α-tris(trisulfide) 31a have been determined by X-ray crystallography.
- Hansen, Holger C.,Senning, Alexander,Hazell, Rita G.
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p. 5145 - 5158
(2007/10/02)
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