250-84-0Relevant articles and documents
High-Temperature Organic Synthesis. XLIV. Reaction of 2-Chlorothiophene with the System Dialkyl Disulfide-Acetylene
Deryagina, E. N.,Sukhomazova, E. N.,Levanova, E. P.,Voronkov, M. G.
, p. 857 - 859 (2007/10/03)
A convenient procedure is proposed for simultaneous preparation of thiophene and thienothiophene from readily accessible reactants by thermolysis of 2-chlorothiophene in the system diethyl disulfide-acetylene at 500-700 deg C.Thiophene results mainly from the reaction of acetylene with vinylthio radicals generated by thermal decomposition of diethyl disulfide.Thienothiophene is formed by reaction of acetylene with 2-thienylthio radicals generated by reaction of 2-chlorothiophene with hydrogen sulfide which is a product of thermal decomposition of diethyl disulfide.A mixture of lower dialkyl disulfides (disulfide oil) can be used instead of diethyl disulfide.
HIGH-TEMPERATURE ORGANIC SYNTHESIS XXXII. REACTION OF ACETYLENE WITH LOWER DIALKYL POLYSULFIDES
Voronkov, M. G.,Deryagina, E. N.,Ostroukhova, L. A.,Korchevin, N. A.,Sukhomazova, E. N.,et al.
, p. 2320 - 2322 (2007/10/02)
Dimethyl disulfide and diethyl di-, tri-, and tetrasulfides or their mixtures react with acetylene in the gas phase at 470-520 deg C with the formation of thiophene and isomeric thienothiophenes as the main products (with overall yields of up to 85percent).The reaction mechanism, involving the formation of vinylthiyl radicals, is discussed.
FORMATION OF THIENOTHIOPHENES IN THE HIGH TEMPERATURE REACTION OF 2-CHLOROTHIOPHENE WITH COMPOUNDS CONTAINING THE C2H5S GROUP
Korchevin, N. A.,Sukhomoazova, E. N.,Turchaninova, L. P.,Efremova, G. G.,Kalinina, N. A.,et al
, p. 857 - 860 (2007/10/02)
The high temperature gas-phase reaction of 2-chlorothiophene with a mixture of diethyl disulfide and diethyl trisulfide constitutes a simple one-step synthesis of a 4:1 mixture of thioeno- and thieno-thiophenes.Their total yield depends on the nature of the donor of the ethylthio group.