Zobrazeno 1 - 10
of 48
pro vyhledávání: '"Carbene dimerization"'
Autor:
Nana Kim, Ross A. Widenhoefer
Publikováno v:
Chemical Science. 10:6149-6156
Cationic gold vinyl carbene/allylic cation complexes of the form (E)-[(L)AuC(H)C(H)CAr2]+ OTf− {L = IPr, Ar = Ph [(E)-5a], L = IPr, Ar = 4-C6H4OMe [(E)-5b], L = P(t-Bu)2o-biphenyl, Ar = 4-C6H4OMe [(E)-5c]} were generated in solution via Lewis acid-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4f6cb502c9f9630222f402483b245a21
https://doi.org/10.1039/c9sc01574d
https://doi.org/10.1039/c9sc01574d
Summary Alkanes are an abundant and valuable resource for transformation into value-added fine chemicals. However, selective functionalization of specific C(sp3)–H bonds in alkanes for alkyl-alkyl bond formation is a significant challenge because o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::721c4f678087efdd36942edc016b3541
https://ora.ox.ac.uk/objects/uuid:2712f1d1-491a-45a7-be25-7c4ed3d87ade
https://ora.ox.ac.uk/objects/uuid:2712f1d1-491a-45a7-be25-7c4ed3d87ade
Autor:
You Li, Yu-Tao Zhao, Ming-Yao Huang, Mengqing Chen, Yi-Pan Li, Shou-Fei Zhu, Zhen-Chuang Xu, Qi-Lin Zhou, Ting Zhou
Publikováno v:
Journal of the American Chemical Society. 142(23)
Catalytic asymmetric reactions in which water is a substrate are rare. Enantioselective transition-metal-catalyzed insertion of carbenes into the O-H bond of water can be used to incorporate water into the stereogenic center, but the reported chiral
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::859177fc5d5b215f1d8332fc2439153a
https://pubmed.ncbi.nlm.nih.gov/32406233
https://pubmed.ncbi.nlm.nih.gov/32406233
Publikováno v:
The Journal of Organic Chemistry. 83:1026-1032
Formal carbene dimerization is a convergent method for the synthesis of alkenes. Herein, we report a Ru(II)-catalyzed carbene dimerization of cyclopropenes and diazo compounds. The yields are up to 97% and the stereoselectivity are up to >20:1. Mecha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a0c3e992203cc9ab33cb1351909b4383
https://doi.org/10.1021/acs.joc.7b02634
https://doi.org/10.1021/acs.joc.7b02634
Publikováno v:
Angewandte Chemie International Edition. 55:273-277
A transition-metal-free difluoromethylenation of diazo compounds that proceeds under mild conditions has been developed and is based on the use of TMSCF2 Br as the difluoromethylene source and tetrabutylammonium bromide (TBAB) as the promoter. The ch
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::86c81340f3539e010e3f437c3aeb6638
https://doi.org/10.1002/anie.201509711
https://doi.org/10.1002/anie.201509711
Autor:
Marion Jean, Daniel Farran, Jean-Valère Naubron, Valérie Monnier, Christian Roussel, Angélique Lindamulage De Silva, Michel Giorgi, Vesna Risso, Nicolas Vanthuyne
Publikováno v:
Chirality. 27:716-721
The title compound was obtained as a side product during dimerization-oxidation steps of the carbene generated from N-methylbenzothiazolium iodide. Chromatography on (S,S)-Whelk O1 column showed on cooling a typical plateau shape chromatogram indicat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::95db9327edc8d1fb00276d18b6a747bd
https://doi.org/10.1002/chir.22492
https://doi.org/10.1002/chir.22492
Publikováno v:
Organometallics. 32:854-861
The synthesis of a new mixed amino–amido N-heterocyclic carbene (type A) starting from anthranilic acid is presented. A new straightforward synthetic approach to related diaminocarbenes of type B is also described. Both NHCs react with group 6 elem
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::680a2fe492f0eb9cfd6bea3ea71249a7
https://doi.org/10.1021/om301152n
https://doi.org/10.1021/om301152n
Autor:
Vladimir F. Mironov, Andrei V. Bogdanov, L. I. Musin, Igor A. Litvinov, Dmitry B. Krivolapov, Rashid Z. Musin
Publikováno v:
Synthetic Communications. 42:2388-2395
The reaction of substituted benzyl-, aroylmethyl-, or 1-phenetylisatins with hexaethyltriaminophosphine has been shown to lead to the formation of a library of 3,3′-biindolinylidene-2,2′-diones with functionalized benzyl-, aroylmethyl-, and 1-phe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c60967f38e734d3a4099c9125c893a95
https://doi.org/10.1080/00397911.2011.558232
https://doi.org/10.1080/00397911.2011.558232
Publikováno v:
Journal of Organometallic Chemistry. 693:1723-1727
Two enantiomerically pure trinuclear compounds of formula (P)-[Mo3S4{(R,R)-Me–BPE}3Br3]Br and (P)-[Mo3Se4{(R,R)-Me–BPE}3Cl3]Cl, (P)-1b.Br and (P)-1c.Cl, respectively, have been synthesized in a good yield and a stereospecific manner by excision o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::41e4f6b6d384ada8415d81cd22a4a64c
https://doi.org/10.1016/j.jorganchem.2007.12.029
https://doi.org/10.1016/j.jorganchem.2007.12.029
Autor:
Thomas Gelbrich, Janine Wolf, Hans-Jörg Hofmann, Winfried Böhlmann, Bärbel Schulze, Matthias Findeisen
Publikováno v:
Angewandte Chemie International Edition. 46:3118-3121
Whereas stable imi-dazolyl-2- and 1,3-thiazol-2-ylidenes are accessible, isothia-zol-3-ylidenes4 could not beisolated until now.This isnotsurprising when one compares some thermodynamic andkineticcharacteristicsfortypicalcarbenereactionsof1,2,and4(R=
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::44400d55937297ade191d4b33d8dacc5
https://doi.org/10.1002/anie.200604305
https://doi.org/10.1002/anie.200604305