- Synthesis and structure of [(Ph3P)2Cu(μ-SeCH2Ph)2In(SeCH2Ph)2] as a single-source precursor for the preparation of CuInSe2 nano-materials
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The reaction of freshly prepared Na[In(SeCH2C6H5)4] with the mixture of CuCl and triphenylphosphine in methanol yielded [(PPh3)2CuIn(SeCH2C6H5)4]
- Pal, Manoj K.,Dey, Sandip,Neogy, Suman,Kumar, Mukesh
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- Synthesis, characterization and biological evaluation of new manganese metal carbonyl compounds that contain sulfur and selenium ligands as a promising new class of CORMs
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Three new manganese carbonyl compounds with heavy atom donors were synthesized and their potential use as photoCORMS was evaluated. Interestingly, all compounds had an elusive binding mode, in which the ligands adopted a κ2-X coordination (wher
- Amorim, André L.,Peterle, Marcos M.,Guerreiro, Ana,Coimbra, Daniel F.,Heying, Renata S.,Caramori, Giovani F.,Braga, Antonio L.,Bortoluzzi, Adailton J.,Neves, Ademir,Bernardes, Gon?alo J. L.,Peralta, Rosely A.
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p. 5574 - 5584
(2019/05/10)
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- Intramolecular homolytic substitution at selenium: Synthesis of novel selenium-containing vitamin E analogues
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Treatment of 1-(benzylselenenyl)-5-butyl-5-nonanol (10) with oxalyl chloride followed by the sodium salt of N-hydroxypyridine-2-thione afforded the corresponding pyridine-2-thione-N-oxycarbonyl (PTOC) oxalate ester which was not isolated but immediately heated to provide 2,2-dibutylselenane (7). This transformation presumably involves a tertiary alkyl radical that undergoes intramolecular homolytic substitution at selenium with loss of the benzyl radical to provide the selenium-containing ring system (7). A similar protocol, when applied to 1-(2-benzylselenenyl-5-methoxyphenyl)-3-methyl3-heptanol (18) and 1-(2-benzylselenenyl-5-methoxyphenyl)-3,7,11,15-tetramethyl-3-hexadecanol (19), followed by deprotection, afforded the selenium-containing α-tocopherol analogues 4 and 1f, respectively, in moderate yields. To the best of our knowledge, these transformations represent the first examples of tertiary radicals involved in homolytic substitution chemistry at selenium.
- Al-Maharik,Engman,Malmstroem,Schiesser
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p. 6286 - 6290
(2007/10/03)
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- The synthesis of 1-phenoxy-3-arylseleno-2-propanol
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A general and efficient synthetic method of 1-phenoxy-3-arylseleno- 2propanol by reducing diaryl diselenides with sodium borohydride in basic environment and their reaction with epoxypropoxyphenols are described.
- Wang, Jin-Xian,Xi, Yunsheng,Hu, Yulai,Du, Zhengyin,Zhao, Kai
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p. 2661 - 2668
(2007/10/03)
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- Preparation of 5-selenopentopyranose sugars from pentose starting materials by Samarium(II) iodide or (phenylseleno)formate mediated ring closures
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2,3,4-Tri-O-benzyl-1,5-dideoxy-5-seleno-D-pentopyranose sugars (16, 23,24) are readily prepared by thermolysis of 2,3,4-tri-O-benzyl-5- benzylseleno-D-ribit-1-yl formate, 2,3,4-tri-O-benzyl-5-benzylseleno-D-xylit- 1-yl formate and 2,3,4-tri-O-benzyl-5-ben
- Lucas, Mathew A.,Nguyen, Oanh T. K.,Schiesser, Carl H.,Zheng, Shi-Long
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p. 3995 - 4000
(2007/10/03)
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- (Aryltelluro)formates as precursors of alkyl radicals: Thermolysis and photolysis of primary and secondary alkyl (aryltelluro)formates
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Alkyl (aryltelluro)formates are effective precursors of oxyacyl, methyl, and primary and secondary alkyl radicals. At room temperature, irradiation of a benzene solution of methyl (aryltelluro)-formates 10-12, 2-methylpropyl (aryltelluro)formates 14 and 15, octyl (phenyltelluro)formate (17), cyclohexyl (aryltelluro)formates 19 and 20, 3β-cholestanyl (aryltelluro)formates 22 and 23, cholesteryl (phenyltelluro)formate (24) and benzyl (phenyltelluro)formate (27) with a 250-W low-pressure mercury lamp leads to the formation of oxyacyl radicals (34), which can be trapped by diphenyl diselenide to give the corresponding alkyl (phenylseleno)formates 13, 16, 18, 21, 24, 26, and 28 with excellent overall conversions. Thermolysis of these telluroformates at 160 °C in the dark leads to the formation of methyl and primary and secondary alkyl aryl tellurides 36-43 in excellent yields. Presumably, these transformations involve oxyacyl radicals, which undergo subsequent decarboxylation at the elevated temperature to afford alkyl radicals, which become involved in further radical chemistry. When 1-(benzylseleno)-5-hexyl (phenyltelluro)formate (44) was thermolysed under these conditions, 2-methylselenane (45) was observed as the sole selenium-containing product, demonstrating the synthetic utility of (aryltelluro)formates as alkyl radical precursors.
- Lucas, Mathew A.,Schiesser, Carl H.
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p. 5754 - 5761
(2007/10/03)
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