31952-16-6Relevant academic research and scientific papers
Rational design of an electrochromic polymer with high contrast in the visible region: Dibenzyl substituted poly(3,4-propylenedioxythiophene)
Krishnamoorthy,Ambade,Kanungo,Contractor,Kumar
, p. 2909 - 2911 (2001)
A dibenzyl substituted poly(3,4-propylenedioxythiophene) was designed and synthesized, and exhibited a contrast of 89% at 632 nm with switching speeds of 400 ms and coloration efficiency of 575 cm2 C-1.
Radical 3-exo-tet cyclization of 1,3-dihalopropanes with SmI2 to form cyclopropanes
Ohkita, Tsuyoshi,Tsuchiya, Yuhsuke,Togo, Hideo
, p. 7247 - 7251 (2008/12/20)
The preparation of 1,1-disubstituted and monosubstituted cyclopropanes from corresponding 2,2-disubstituted and 2-monosubstituted 1,3-dihalopropanes, respectively, with SmI2 in THF was efficiently carried out. The reaction mechanism was propose
1,3-DIPHOSPHINOPROPANE LIGANDS AND TRANSITION METAL COMPLEXES FORMED THEREFROM, THEIR PREPARATION AND USE
-
Page 3-4, (2008/06/13)
In this patent are described 1,3-diphosphinopropane ligands of general formula (I) and their metal complexes to be employed as catalysts for chemical reactions in water or in aqueous media.
The synthesis and crystal structure of β-substituted thiaporphyrins with novel cyclic substituents
Agarwal, Neeraj,Mishra, Sarada Prasad,Hung, Chen-Hsiung,Kumar, Anil,Ravikanth, Mangalampalli
, p. 1173 - 1180 (2007/10/03)
21,23-Dithiaporphyrins and 21-monothiaporphyrins with propane-1,3-diyldioxy and its derivatives at the β-thiophene carbons were synthesized and characterized. The cyclic substituents introduced at the β-thiophene carbons altered the electronic properties of the porphyrins. The X-ray structure for 2,3-bis(2,2-dibenzylpropane-1,3-diyldioxy) substituted 21-monothiaporphyrin showed a more planar structure compared to the saddle shaped structure reported for β-unsubstituted 21-monothiaporphyrins.
Synthesis of substituted cyclopropanes from 1,3-diols through the corresponding cyclic sulfates
Guijarro, David,Yus, Miguel
, p. 11445 - 11456 (2007/10/02)
The reaction of different cyclic sulfates 2 (easily prepared from the corresponding 1,3-diols 1 following the Sharpless methodology) with an excess of lithium powder and a catalytic amount of DTBB (5 mol %) leads to the corresponding substituted cyclopropanes 3 through a γ-elimination process, the sulfate ion acting as leaving group.
Stereoselective Epoxidation of Phe-Gly and Phe-Phe Vinyl Isosteres
Jenmalm, Annika,Berts, Wei,Li, Yi-Lin,Luthman, Kristina,Csoeregh, Ingeborg,Hacksell, Uli
, p. 1139 - 1148 (2007/10/02)
Novel Phe-Gly and Phe-Phe isosteres have been synthesized.Vinylic isosteres of Phe-Gly and Phe-Phe were prepared by facile Julia reactions, and the resulting stereoisomers were isolated and epoxidized (m-chloroperbenzoic acid).Observed stereoselectivities
Diethers usable in the preparation of Ziegler-Natta catalysts
-
, (2008/06/13)
Diethers of general formula: STR1 where R, RI, RII, RIII, RIV and RV are the same or different and are H, C1-18 linear or branched alkyl, C5-18 cycloalkyl, C6? aryl, C7-18 alkylaryl or C7-18 arylalkyl radicals, provided that when R is alkyl, RI is other than H or alkyl and when RI is alkyl, R is other than H or alkyl; RVI and RVIII are the same or different and are C1-18 linear or branched alkyl, C5-18 cycloalkyl, C6-18 aryl, or C7-18 arylalkyl radicals; and two or more of R to RV may be bonded to form a cyclic structure having 5 to 18 carbon atoms. The diethers are particularly useful in the preparation of Ziegler-Natta catalysts.
Synthesis of Benzo-13-crown-4 Derivatives
Czech, Bronislaw P.,Zazulak, Wolodymyr,Kumar, Anand,Dalley, N. Kent,Weiming, Jiang,Bartsch, Richard A.
, p. 1387 - 1394 (2007/10/02)
A series of nine, new benzo-13-crown-4 compounds which bear one or two substituents on the three-carbon bridge has been prepared in good yields by cesium fluoride-assisted cyclization reactions of catechol with ditosylates of the appropriate glycols.The solid state structure of 9,9-dibenzyl-2,3-benzo-13-crown-4 is determined and compared with the reported structure for the unsubstituted crown ether.
New Synthesis of Cyclopropanes from 1,3-Dicarbonyl Compounds Utilizing Electroreduction of 1,3-Dimethanesulfonates
Shono, Tatsuyo,Matsumura, Yoshihiro,Tsubata, Kenji,Sugihara, Yoshihiro
, p. 3090 - 3094 (2007/10/02)
Electroorganic synthesis of cyclopropanes from dimethanesulfonates of 1,3-diols is described.The process involves reduction of 1,3-dicarbonyl compounds with LiAlH followed by esterification with methanesulfonyl chloride and electroreduction.
