- Regioselective Diboron-Mediated Semireduction of Terminal Allenes
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A method for the regioselective reduction of the terminal double bond of 1,1-disubstituted allenes has been developed. In the presence of a palladium catalyst, tetrahydroxydiboron and stoichiometric water, allene semireduction proceeds in high yield to afford Z-alkenes selectively.
- Gates, Ashley M.,Santos, Webster L.
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supporting information
p. 4619 - 4624
(2019/12/11)
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- Aggregation-induced red light emission material and preparation method thereof
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The invention discloses an aggregation-induced red light emission material and a preparation method thereof. The aggregation-induced red light emission material has a structural formula represented by the formula [I]. The aggregation-induced red light emi
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Paragraph 0073; 0074
(2017/08/28)
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- Palladium/Copper-Catalyzed Oxidative Coupling of Arylboronic Acids with Isocyanides: Selective Routes to Amides and Diaryl Ketones
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An efficient and alternative oxidative cross-coupling strategy starting from arylboronic acids and isocyanides for the selective synthesis of amides and diaryl ketones with palladium/copper catalysis is developed. Various substituted benzamides and benzop
- Lu, Fangling,Chen, Ziyue,Li, Zhen,Wang, Xiaoyan,Peng, Xinyue,Li, Cong,Fang, Lingtong,Liu, Dong,Gao, Meng,Lei, Aiwen
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supporting information
p. 3954 - 3957
(2017/08/14)
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- Synthesis of Symmetrical Diaryl Ketones by Cobalt-Catalyzed Reaction of Arylzinc Reagents with Ethyl Chloroformate
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Symmetrical diaryl ketones were prepared by a cross-coupling reaction between aryl bromides and ethyl chloroformate. This new method, which uses a catalyst composed of CoBr2and a bipyridine ligand along with readily available starting materials, allows for the synthesis of a variety of symmetrical diaryl ketones in moderate to excellent yields (37–99 %) under mild conditions. This reaction, in which ethyl chloroformate acts as a surrogate of carbon monoxide in the presence of cobalt and zinc, represents an interesting alternative to previously known approaches for the synthesis of diarylmethanones.
- Rérat, Alice,Michon, Christophe,Agbossou-Niedercorn, Francine,Gosmini, Corinne
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p. 4554 - 4560
(2016/09/23)
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- Pd/Cu-cocatalyzed aerobic oxidative carbonylative homocoupling of arylboronic acids and CO: A highly selective approach to diaryl ketones
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A highly selective Pd/Cu-cocatalyzed aerobic oxidative carbonylative homocoupling of arylboronic acids has been developed. This method employs a simple catalytic system, readily available boronic acids as the substrates, molecular oxygen as the oxidant, and 1 atm of CO/O2, which makes this method practical for further applications.
- Ren, Long,Jiao, Ning
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supporting information
p. 2411 - 2414
(2014/10/15)
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- Oxalyl chloride as carbonyl synthon in Pd-catalyzed carbonylations of triarylbismuth and triarylindium organometallic nucleophiles
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Oxalyl chloride has been demonstrated to function as C1 carbonyl synthon in the carbonylations of triarylbismuth and triarylindium nucleophiles under palladium-catalyzed conditions. All the three aryl groups from both bismuth and indium reagents participated in carbonylative couplings to afford the corresponding functionalized ketones in high yields. This study also disclosed a novel utilization of oxalyl chloride as facile alternative source of CO for carbonylations under palladium catalysis.
- Rao, Maddali L. N.,Venkatesh, Varadhachari,Dasgupta, Priyabrata
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supporting information; experimental part
p. 4975 - 4980
(2011/01/12)
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- Synthesis of new tetraoxacyclophanes containing benzophenone units
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4,4′-Dihydroxybenzophenone was used as a precursor for synthesis of macrocyclic compounds. Low-temperature crystal structures were determined for 4,4′-diethoxybenzophenone (10), C17H18O3, orthorhombic, Pbcn, a = 7.2891(12), b = 6.2827(10), c = 31.1000(5) A, Z = 4 (one molecule with twofold symmetry), and 1,5,19,23-tetraoxa-12,30-dioxo[5.1.5.1]paracyclophane (6), C34H32O6, triclinic, P(-1), a = 9.1559(12), b = 11.634(2), c = 14.124(2) A, α = 93.745(12), β = 102.966(10), γ = 108.591(12)°, Z = 2, (two independent molecules each with inversion symmetry). The interplanar angles between aromatic rings is 53° for compound 10 and 53°, 49° for the two molecules of 6. IR , Raman and UV spectra were recorded for both compounds. Key words: tetraoxaparacyclophanes, benzophenone, preparation, crystal structure, IR and Raman spectra.
- Kus,Jones
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p. 965 - 977
(2007/10/03)
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- Sterically Hindered Free Radicals, XIX. - Stable 4,4',4''-Trisubstituted Triphenylmethyl Radicals
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The title radicals (4-R-C6H4)3C. (1), R = F, Cl, Ph, OMe, NO2, tBu, OEt, SMe, CN, CF3, have been prepared, the latter four for the first time, and the ESR spectra have been recorded. aoH, amH, and as
- Duennebacke, Dieter,Neumann, Wilhelm P.,Penenory, Alicia,Stewen, Ulrich
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p. 533 - 536
(2007/10/02)
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