7334-55-6Relevant academic research and scientific papers
Studies of the complexes of the 4-cyanophenyl[bis(ethylsulfonyl)]methane and 4-cyanophenyl[bis(benzylsulfonyl)]methane C-acids and TBD and MTBD N-bases
Binkowska, Iwona,Huczyński, Adam,Brzezinski, Bogumi?,Jarczewski, Arnold
, p. 188 - 194 (2008)
The 1:1 complexes of 4-cyanophenyl[bis(ethylsulfonyl)]methane (CHA) and 4-cyanophenyl[bis(benzylsulfonyl)]methane (CHB) with 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) and 7-methyl-1,5,7-triazabicyclo[4.4.0]dec-5-ene (MTBD) have been examined by ESI MS, s
Ethyl lactate mediated thioacetalization of aldehydes at ambient temperature
Wan, Jie-Ping,Jing, Yanfeng,Liu, Yunyun
, p. 1302 - 1305 (2016/09/28)
Dithioacetalization reactions of aldehydes with thiols/thiophenols have been successfully achieved at room temperature by employing the green, bio-based ethyl lactate as the reaction medium. By means of this sustainable approach, a class of dithioacetals has been acquired with high diversity and efficiency.
Cyanuric chloride-catalyzed thioacetalization for organocatalytic synthesis of thioacetals
Liu, Yaqin
, p. 679 - 682 (2016/05/09)
The thioacetalization of aromatic aldehydes has been realized with broad diversity in the presence of various thiols and thiophenols using cyanuric chloride as an organocatalyst.
Synthesis in ionic liquids only: Access to α-oxo-γ-thio-esters via Mukaiyama coupling
Jebri, Khouloud,Mazières, Marie-Rose,Ballereau, Stéphanie,Ben Ayed, Ta?cir,Plaquevent, Jean-Christophe,Baltas, Michel,Guillen, Frédéric
supporting information, p. 1353 - 1356 (2014/03/21)
Ionic liquids are solvents general enough to conduct a multi-step process in organic synthesis. We show that both the preparation of starting materials (thioacetals and enoxysilane) as well as their coupling can be realized in such medium.
Triflic acid catalyzed reductive coupling reactions of carbonyl compounds with O-, S-, and N-nucleophiles
Gellert, Beate A.,Kahlcke, Nils,Feurer, Markus,Roth, Stefanie
supporting information; experimental part, p. 12203 - 12209 (2011/11/07)
Highly efficient metal-free reductive coupling reactions of aldehydes and ketones with a range of nucleophiles in the presence of triflic acid (1-5 mol %) as the catalyst are presented. The reactions can be performed at ambient temperature without exclusion of moisture or air. A range of symmetrical and unsymmetrical ethers were obtained by this method in high yields and short reaction times. For the first time, the influence of additional functionalization has been studied. Furthermore, the formation of thioethers from ketones (by addition of unmodified thiols) and of sulfonamides from either aldehydes or ketones has been achieved under catalytic conditions.
Silica-supported phosphorus pentoxide: A reusable catalyst for S,S-acetalization of carbonyl groups under ambient conditions
Shaterian, Hamid Reza,Azizi, Kobra,Fahimi, Nafiseh
experimental part, p. 85 - 91 (2012/01/06)
Phosphorus pentoxide supported on silica gel (P2O 5/SiO2) efficiently acts as a highly active and reusable catalyst for cyclic and non-cyclic S,S-acetalization of a variety of carbonyl compounds under mild, solvent-free an
Catalytic syntheses of γ-functionalized α-keto esters from thioacetals and N,O-acetals
Krebs, Anke,Bolm, Carsten
experimental part, p. 4055 - 4060 (2011/06/24)
Ethyl 2-(trimethylsilyloxy)acrylic ester (1a) reacts with thioacetals providing the corresponding α-keto-γ-thio esters in good to satisfactory yields. Whereas aminals do not react, N,O-acetals lead to γ-amino-α-keto esters in good to excellent yields. All reactions proceed under mild reaction conditions, and no additional work up is required. Subsequent transformations of the obtained products to the corresponding α-oximes have been demonstrated.
Silica-PCl5: A novel heterogenous catalyst for simple and efficient chemoselective protection of carbonyl compounds
Pandey, Lokesh Kumar,Pathak, Uma,Tank, Rekha,Mazumder, Avik
experimental part, p. 167 - 171 (2010/07/05)
A simple, efficient and environmentally benign procedure has been developed for chemoselective protection of carbonyl compounds using the newly developed heterogeneous catalyst: Silica-PCl5. A variety of aldehydes and ketones were efficiently c
Hafnium trifluoromethanesulfonate (hafnium triflate) as a highly efficient catalyst for chemoselective thioacetalization and transthioacetalization of carbonyl compounds
Wu, Yan-Chao,Zhu, Jieping
supporting information; experimental part, p. 9522 - 9524 (2009/04/06)
(Chemical Equation Presented) A range of carbonyl compounds including aliphatic and aromatic aldehydes and ketones were converted to the corresponding thioacetals in high yields in the presence of a catalytic amount of hafnium trifluoromethanesulfonate (0.1 mol %, room temperature). The mild conditions tolerated various sensitive functional and protecting groups and were racemization-free when applied to α-aminoaldehydes. Transacetalization and chemoselective thioacetalization of aromatic aldehydes in the presence of aliphatic aldehydes and ketones were also documented.
