Nanolayered cobalt–molybdenum sulphides (Co–Mo–S) catalyse borrowing hydrogen C–S bond formation reactions of thiols or H<sub>2</sub>S with alcohols
作者:Iván Sorribes、Avelino Corma
DOI:10.1039/c8sc05782f
日期:——
Nanolayered cobalt–molybdenum sulphide (Co–Mo–S) materials have been established as excellent catalysts for C–S bond construction. These catalysts allow for the preparation of a broad range of thioethers in good to excellent yields from structurally diverse thiols and readily available primary as well as secondary alcohols. Chemoselectivity in the presence of sensitive groups such as double bonds,
[EN] SULFUR EXTRUSION FROM DISULFIDES BY CARBENES<br/>[FR] EXTRUSION DE SOUFRE À PARTIR DE DISULFURES PAR DES CARBÈNES
申请人:UNIV HEIDELBERG
公开号:WO2021214243A1
公开(公告)日:2021-10-28
The present invention relates to a method for preparing a compound T having a thioether group from a compound D having a disulfide group in the presence of a carbene.
本发明涉及一种在卡宾的存在下,从具有二硫键的化合物D制备具有硫醚基团的化合物T的方法。
APPARATUS AND METHOD FOR PRODUCING RESIN
申请人:TEIJIN LIMITED
公开号:EP1120435A1
公开(公告)日:2001-08-01
A method of producing a polycarbonate or the like which is excellent in hydrolysis and heat stability such as a reduction in molecular weight at the time of molding and color retention and moldability such as releasability and transferability, rarely experiences residence deterioration such as coloring, crosslinking and gel formation and has an extremely small content of foreign matter by employing a special structure for an opening in the side surface of a horizontal cylindrical vacuum resin treating apparatus, supplying a molten polycarbonate into a unidirectional rotary intermeshing double-screw extruder under specific conditions, adding a specific agent under specific conditions and cleaning the inner surface of a production apparatus by a specific method.
POLYCARBONATE, PROCESS FOR PRODUCING THE SAME, AND MOLDED ARTICLE THEREOF
申请人:TEIJIN LIMITED
公开号:EP1191049A1
公开(公告)日:2002-03-27
A polycarbonate which is stable against thermal decomposition at a temperature range for melt molding without adding a heat resistant stabilizer and suitable for the melt molding of a thin product, production method and molded products thereof. The polycarbonate is comprising mainly a recurring unit represented by the following formula (1),
and has a percentage of the total of integrated intensities of all signals detected at four ranges, δ = 2.14 to 2.17 ppm, δ = 3.46 to 3.49 ppm, δ = 3.62 to 3.69 ppm and δ = 5.42 to 5.46 ppm to the integrated intensity of a signal derived from a methyl group detected at a range of δ = 1.50 to 2.00 ppm of 0.01 to 2.0 % in its 1H-NMR spectrum in heavy chloroform and a viscosity average molecular weight of 10,000 to 100,000.