20890-79-3

Basic information

• Product Name: Benzene, [2-(ethylthio)ethenyl]-, (Z)-
• CAS NO: 20890-79-3
• Molecular Formula: C10H12S
• Molecular Weight: 164.271
• Mol File: 20890-79-3.mol
• Article Data: 9

Chemical Properties

• CAS DataBase Reference: Benzene, [2-(ethylthio)ethenyl]-, (Z)-(CAS DataBase Reference)
• NIST Chemistry Reference: Benzene, [2-(ethylthio)ethenyl]-, (Z)-(20890-79-3)
• EPA Substance Registry System: Benzene, [2-(ethylthio)ethenyl]-, (Z)-(20890-79-3)

Safety Data

• Hazardous Substances Data: 20890-79-3(Hazardous Substances Data)

Upstream product

• 14476-62-1 1-Ethylthio-2-phenyl-acetylen 
• 588-73-8 (Z)-β-bromostyrene 
• 75-08-1 ethanethiol 
• 22914-07-4 α-(ethylthio)styrene 
• 15436-06-3 (E)-β-(methylthio)styrene 
• 75-03-6 ethyl iodide 
• 54669-43-1 potassium ethanethiolate 
• 536-74-3 phenylacetylene 
• 35444-20-3 potassium ethyltrithiocarbonate 
• 20890-80-6 (E)-[2-(ethylsulfanyl)vinyl]benzene 
• 224043-59-8 <(benzyloxycarbonyl)(ethylsulfinyl)methylene>triphenylphosphorane 
• 932-87-6 1-Bromo-2-phenylacetylene 
• 30383-01-8 lithium thioethoxide 

Downstream Products

• 20890-80-6 (E)-[2-(ethylsulfanyl)vinyl]benzene 

Relevant articles and documents

N-heterocyclic carbene-catalyzed regio- and stereoselective hydrothiolation reaction of alkynes

N-heterocyclic carbenes (NHCs) have been utilized as Br?nsted base to catalyze the hydrothiolation reaction between alkynes and thiols to produce the vinyl sulfides stereoselectively.

Flash vacuum pyrolysis of stabilised phosphorus ylides. Part 15. Generation of alkoxycarbonyl(sulfenyl)carbenes and their intramolecular insertion to give alkenyl sulfides

A range of 18 alkoxycarbonyl sulfinyl phosphorus ylides 9 have been prepared and their behaviour upon flash vacuum pyrolysis (FVP) at 600 deg C examined. For R1 = H, Me and Et they lose Ph3PO and in some cases Ph3P to give mixtures of products including the alkenyl sulfides 10, the sulfides 11, the disulfides 12 and the thioesters 14. The alkenyl sulfides 10 most likely arise from intramolecular insertion of the alkoxycarbonyl sulfenyl carbenes resulting from loss off Ph3PO to produce β-lactones which then lose CO2 and this is supported by the results from 13C labelled ylides. Possible mechanisms for the formation of 11 and 14 are also presented and the feasibility of various steps has been examined by preparation and pyrolysis of the proposed intermediates. In contrast, pyrolysis of the ylides 9 where R1 = Ph and the tert-butoxycarbonyl ylides 30 leads mainly to complete fragmentation with loss of Ph3PO and benzyl alcohol or 2-methylpropan-2-ol and does not give any useful sulfur-containing products. Four alkoxy-carbonyl sulfonyl diazo compounds 33 have been prepared and in three cases they give the alkenyl sulfones 34 upon FVP at 400 deg C, probably by an intramolecular insertion and decarboxylation process analogous to the formation of 10 from 9. On the other hand the alkoxycarbonyl carbenes produced by FVP of the amino acid-derived diazo compounds 35 undergo alternative proocesses with no sign of β-lactone formation. Fully assigned 13C NMR data are presented for 13 of the ylides.

Structure-stability relationships in unsaturated sulfur compounds. VIII. Thermodynamics of the geometric isomers of vinyl sulfides, sulfoxides and sulfones

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