75784-96-2

Upstream product

• 4198-12-3 3,3,5,5-tetraphenyl-1,2,4-trithiolane 
• 762-42-5 dimethyl acetylenedicarboxylate 
• 88793-72-0 2-methyl-1,1-diphenylthiirane 
• 1450-31-3 Thiobenzophenon 
• 4214-38-4 (diphenylmethylene)triphenylphosphorane 
• 144602-84-6 3-(2,4,6-triisopropylphenyl)-3-{2,4,6-tris(bis(trimethylsilyl)methyl)phenyl}-5,5-diphenyl-1,2,4,3-trithiastannolane 
• 181775-00-8 1,1,3,3-tetramethyl-7,7-diphenyl-6-oxa-5,8-dithiaspiro[3.4]octan-2-one 
• 189503-05-7 3,3,6,6-tetraphenyl-1,2,4,5-tetrathiane 
• 153111-34-3 GeS₃(C(C₆H₅)2)(C₆H₂(CH(Si(CH₃)3)2)3)(C₆H₂(CH(CH₃)2)3) 

Downstream Products

• 269744-35-6 1-hydroxy-1-phenyl-1H-isothiochromene-3,4-dicarboxylic acid dimethyl ester 

Relevant academic research and scientific papers

Generation of Thiosulfines by Dithiation of Diarylmethylenetriphenylphosphoranes

Reaction of phosphonium ylides with excess sulfur afforded the corresponding thiosulfines, which were trapped with maleic anhydride to give the corresponding cycloadducts (1,2-dithiolanes) in good yields.Intermediary thiosulfines were also formed by sulfu

Hetero-Diels - Alder reactions of hetaryl and aryl thioketones with acetylenic dienophiles

Selected hetaryl and aryl thioketones react with acetylenecarboxylates under thermal conditions in the presence of LiClO4 or, alternatively, under high-pressure conditions (5 kbar) at room temperature yielding thiopyran derivatives. The hetero-

An efficient synthesis of 1,2-dithiolanes and 1,2,4-trithiolanes by the reaction of phosphorus ylides with elemental sulfur

Reaction of diarylmethylenetriphenylphosphoranes with elemental sulfur followed by the addition of maleic anhydride afforded 1,2-dithiolanes in good yields. When the reaction was carried out in the presence of adamantane-2-thione, two types of 1,2,4-trithiolane were formed. Thiation of thiobenzophenones with elemental sulfur also afforded the corresponding 1,2-dithiolanes.

The conversion of thioketones to 1,2,4,5-tetrathianes and its mechanism

Thiobenzophenone and adamantanethione react with sulfur (1:1) under catalysis by sodium thiophenoxide in acetone at rt furnishing 1,2,4,5-tetrathianes (9 and 43) in high yields. An attack of the oligothiolate (R-SX-) on the C-atom of C = S is proposed as initiating step. Thione S-sulfides (R2C = S+ - S-, thiosulfines) cannot be intermediates, since they combine fast with thiones affording 1,2,4-trithiolanes. With more sulfur, adamantanethione produces the 1,2,3,5,6-pentathiepane-bis(spiroadamantane) (44) which interconverts with the tetrathiane, but not with the 1,2,4-trithiolane, in an equilibrium catalyzed by R-SX-. According to 13C NMR evidence, the tetrathiane-bis(spiroadamantane) occurs in a twist conformation which inverts with ΔG≠ 16.0 kcal mol-1.

1,3-dipolar activity in cycloadditions of an aliphatic sulfine

2,2,4,4-Tetramethyl-3-thioxocyclobutanone S-oxide (4) combines with diaryl thioketones at room temperature furnishing spiro-1,2,4-oxadithiolanes 6 in equilibrium reactions. Compound 6a was oxidized to the cis-S,S-dioxide 9, the structure of which was esta

SYNTHESIS OF SMALL-RING SULFUR COMPOUNDS CONTAINING GERMANIUM AND TIN

Synthesis of some novel types of four-membered organosulfur compounds containing germanium and tin by cycloaddition of germanethione (R1R2Ge=S) and stannanethione (R1R2Sn=S) intermediates is reported.

The First Stable 1,2-Thiastannete and 1,2-Selenestannete: their Syntheses and Crystal Structures

Thermal decomposition of overcrowded 1,2,4,3-trichalcogenastannolanes 1 resulted in the formation of the first stable 1,2-chalcogenastannete derivatives 3 via cycloaddition of intermediary stannanethione and stannanselone 2; the molecular structures of 3 were determined by X-ray crystallographic analysis.

Thermal Reactions of Thioketones with Dimethyl Acetylenedicarboxylate

The dark reaction of thiobenzophenone (1) with dimethyl acetylenedicarboxylate leads at room temperature to a dimethyl 1H-benzothiopyrandicarboxylate of type 5 in 92percent yield.Xanthione (6a) combines with dimethyl acetylenedicarboxylate to form 7a (59-48percent) and 8 (26percent), whereas the analogous reaction of the thioxanthione (6b) proceeds with formation of 7b in 21percent yield.