Zobrazeno 1 - 10
of 48
pro vyhledávání: '"Jun-Cheng Zheng"'
Publikováno v:
Pure & Applied Chemistry. Mar2010, Vol. 82 Issue 3, p625-634. 10p. 10 Diagrams, 3 Charts.
Publikováno v:
European Journal of Organic Chemistry. 2014:506-510
The different reaction profiles of lithium trimethylsilyldiazomethane with various 4-alkenyl ketones are described. It was found that the individual steps along the reaction pathway including a Brook rearrangement, elimination of lithium trimethylsil
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c4beeee9f63c5a9a99b6bb9db40dc8af
https://doi.org/10.1002/ejoc.201301575
https://doi.org/10.1002/ejoc.201301575
Autor:
Jun-Cheng Zheng, Haolai Zhou, Zhi-Xiang Yu, Zheng Wang, Xiu-Li Sun, Yong Liang, Chao Deng, Jiao-Long Zhou, Yong Tang
Publikováno v:
Angewandte Chemie. 123:8020-8024
DFT calculations show, that the bulkiness of the ligand controls the reaction between α-benzylidene-β-dicarbonyl compounds (I) and diazoacetate (II) to give either the five- or seven-membered products (III)/(V) or (VI)/(VII).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8e11008df69538a046922c6eb957c012
https://doi.org/10.1002/ange.201100551
https://doi.org/10.1002/ange.201100551
Publikováno v:
Chinese Journal of Chemistry. 29:995-1000
1-Aminocyclopropanecarboxylic acid derivatives are synthesized from readily available dehydroamino acid derivatives via sulfur ylide. A range of different ylides are employed and the corresponding aminocyclopropanes are afforded with reasonable diast
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a20a79230004f2fef9abd31c2bf96ebe
https://doi.org/10.1002/cjoc.201190202
https://doi.org/10.1002/cjoc.201190202
Publikováno v:
Synlett. 2011:935-938
New pseudo-C3-symmetric hetero-trisoxazoline can be easily prepared on a gram scale in good yield. Its combination with copper(II) triflate exhibits high enantiomeric induction in the asymmetric Friedel-Crafts alkylation between indoles and alkyliden
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::246b3d2a55dbacb581c6a0872b127f3c
https://doi.org/10.1055/s-0030-1259721
https://doi.org/10.1055/s-0030-1259721
Publikováno v:
Tetrahedron. 66:9703-9707
A series of pyrrolidine-urea bifunctional organocatalysts was efficiently synthesized and applied to the asymmetric Michael addition of ketone to nitroolefin. Theoretical study was performed to shed light on the origin of their different activities a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ec76e2386bc372557a768b297b5fba83
https://doi.org/10.1016/j.tet.2010.10.038
https://doi.org/10.1016/j.tet.2010.10.038
Publikováno v:
Chinese Journal of Chemistry. 28:1618-1622
A tandem intramolecular Michael addition/Wittig reaction has been developed for the synthesis of fused cyclohexadiene derivatives from phosphonium salt 3. This annulation reaction affords the cyclohexadienes in moderate to excellent yields, depending
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::881af9ef5cf6b4fb88197c4a27ad92b7
https://doi.org/10.1002/cjoc.201090274
https://doi.org/10.1002/cjoc.201090274
Publikováno v:
Angewandte Chemie International Edition. 49:4463-4466
Alkoxy divinyl β-ketoesters (I) undergo the title reaction to give cyclopenta[b]pyran derivatives (II) with high regio-, diastereo- and enantioselectivities.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c0c16678c9b9c8be2fc589cc73d12761
https://doi.org/10.1002/anie.200907266
https://doi.org/10.1002/anie.200907266
Publikováno v:
Organic Letters. 12:504-507
Highly diastereoselective synthesis of cis-trisubstituted vinylaziridines containing a quaternary carbon center is realized by a one-pot protocol in which the combination of sulfur ylide-mediated aziridination of cyclic ketimines and Pd(0)-catalyzed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e28bb431b95c4a6dbf1d961c437c678c
https://doi.org/10.1021/ol9027072
https://doi.org/10.1021/ol9027072
Publikováno v:
Chem. Commun.. 47:1342-1344
A pyridine-catalyzed ylide cyclization affording dihydrofurans and dihydropyrroles has been developed. In the presence of a catalytic amount of pyridine and Fe(Tcpp)Cl, α-ylidene-β-diketones and α,β-unsaturated imines react with diazoacetates pro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::86b9d11730c0875cbfeb282fe53fa62e
https://doi.org/10.1039/c0cc02347g
https://doi.org/10.1039/c0cc02347g