110452-14-7Relevant articles and documents
The effect of α-alkoxy group in radical-mediated β-fragmentation reactions
Kim, Sunggak,Kim, Kwan Hee,Cho, Jin Rai
, p. 3915 - 3918 (1997)
β-Fragmentation reactions of alkyl and aminyl radicals were greatly facilitated by the presence of α-alkoxy groups.
Hydrodesulfurization of dibenzothiophene and its hydrogenated intermediates over sulfided Mo/γ-Al2O3
Wang, Huamin,Prins, Roel
, p. 153 - 164 (2008)
Two intermediates of dibenzothiophene (DBT)-tetrahydro-DBT (THDBT) and hexahydro-DBT (HHDBT)-were synthesized, and their hydrodesulfurization (HDS) mechanism was investigated over Mo/γ-Al2O3 at 300-340 °C and 5 MPa in the absence and presence of H2S and 2-methylpiperidine. The rate constants of all steps in the kinetic network of the HDS of DBT were measured. THDBT underwent desulfurization by hydrogenolysis to 1-phenylcyclohexene, followed by hydrogenation to phenylcyclohexane. The desulfurization of HHDBT occurred by hydrogenolysis of the aryl C{single bond}S bond and then cleavage of the cycloalkyl C{single bond}S bond of the resulting thiol by elimination to 1-phenylcyclohexene and by hydrogenolysis to phenylcyclohexane. H2S strongly inhibited the desulfurization of all three molecules but did not inhibit (de)hydrogenation. 2-Methylpiperidine also had a strong inhibitory effect, especially on (de)hydrogenation and, to a lesser extent, on desulfurization. The order of the inhibition of DBT, THDBT, and HHDBT was explained by the adsorption constants of these three molecules.
A Novel Rearrangement of Vinyl Sulphoxides
Lucchi, Ottorino De,Marchioro, Gaetano,Modena, Giorgio
, p. 513 - 514 (1984)
Acid catalysed isopropenyl acetate treatment of vinyl sulphoxides results in a formal oxygen transposition from sulphur to the β-olefinic carbon via a presumed -sigmatropic rearrangement of an acetoxysulphonium salt.
SALT, ACID GENERATOR, RESIST COMPOSITION AND PRODUCTION METHOD OF RESIST PATTERN
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Paragraph 0255, (2017/02/02)
PROBLEM TO BE SOLVED: To provide a salt, an acid generator, a resist composition and the like, from which a resist pattern can be produced with good CD uniformity (CDU). SOLUTION: The salt includes a group represented by formula (aa), preferably formula (
Disulfide-based metal-free α-sulfanylation of ketones
Vaquer, Andrea F.,Frongia, Angelo,Secci, Francesco,Tuveri, Enrica
, p. 96695 - 96704 (2015/11/24)
An eco-friendly methodology for the direct α-sulfanylation of ketones, has been developed. The procedure, based on the use of functionalized diaryldisulfides and catalyzed by d,l-proline, represents a mild and efficient approach for the preparation of α-arylthio-ketones.
α-Organylchalcogenation of aldehydes and ketones with diorganyl dichalcogenides promoted by K3PO4
Movassagh, Barahman,Yousefi, Ali
, p. 1173 - 1177 (2014/06/24)
A new catalytic method for direct α-organylchalcogenation of aldehydes and ketones has been developed. When various aldehydes and ketones were allowed to react with diorganyl dichalcogenides in the presence of K 3PO4, under mild reac
Catalytic, Enantioselective Sulfenylation of Ketone-Derived Enoxysilanes
Denmark, Scott E.,Rossi, Sergio,Webster, Matthew P.,Wang, Hao
supporting information, p. 13016 - 13028 (2015/09/15)
A catalytic, enantioselective, Lewis base-catalyzed α-sulfenylation of silyl enol ethers has been developed. To avoid acidic hydrolysis of the silyl enol ether substrates, a sulfenylating agent that did not require additional Br?nsted acid activation, namely N-phenylthiosaccharin, was developed. Three classes of Lewis bases - tertiary amines, sulfides, and selenophosphoramides - were identified as active catalysts for the α-sulfenylation reaction. Among a wide variety of chiral Lewis bases in all three classes, only chiral selenophosphoramides afforded α-phenylthio ketones in generally high yield and with good enantioselectivity. The selectivity of the reaction does not depend on the size of the silyl group but is highly sensitive to the double bond geometry and the bulk of the substituents on the double bond. The most selective substrates are those containing a geminal bulky substituent on the enoxysilane. Computational analysis revealed that the enantioselectivity arises from an intriguing interplay among sterically guided approach, distortion energy, and orbital interactions.
Toward the total synthesis of palhinine A: Expedient assembly of multifunctionalized isotwistane ring system with contiguous quaternary stereocenters
Zhang, Guo-Biao,Wang, Fang-Xin,Du, Ji-Yuan,Qu, Hu,Ma, Xiao-Yan,Wei, Meng-Xue,Wang, Cheng-Tao,Li, Qiong,Fan, Chun-An
, p. 3696 - 3699 (2012/09/21)
The stereoselective, expedient assembly of the key functionalized isotwistane (bridged tricyclo[4.3.1.03,7]decane) system, 5/6/6 ring, with contiguous quaternary stereocenters in Lycopodium alkaloid palhinine A and its analogues via an intramol
Diphenyl diselenide-assisted α-phenylthiolation of carbonyl compounds with diphenyl disulfide
Anbou, Hiroaki,Umeda, Rui,Nishiyama, Yutaka
experimental part, p. 1248 - 1250 (2012/01/31)
For the cesium carbonate-catalyzed α-phenylthiolation of carbonyl compounds with diphenyl disulfide, the yields of the α-phenylthio carbonyl compounds were dramatically improved by the addition of a catalytic amount of diphenyl diselenide.
Rhodium-catalyzed organothio exchange reaction of α-organothioketones with disulfides
Arisawa, Mieko,Toriyama, Fumihiko,Yamaguchi, Masahiko
experimental part, p. 1349 - 1352 (2010/12/24)
RhH(PPh3)4 and 1,2-bis(diphenylphosphino)ethane (dppe) catalyzed the organothio exchange reaction of α-organothioketones and organic disulfides. The reaction was affected by the structure of the substrate: α-phenylthio and α-alkylthio aryl ketones reacted effectively with diaryl and dialkyl disulfides; α-phenylthio dialkyl ketones reacted with diaryl disulfides but not with dialkyl disulfides; diaryl disulfides with electron-donating p-substituents were more reactive than those with electron-withdrawing p-substituents.
