Zobrazeno 1 - 10
of 103
pro vyhledávání: '"Max Koenig"'
Publikováno v:
Journal of Organometallic Chemistry. 690:1028-1032
This paper describes the photochemical and the thermal isomerization of s-cis (E,E) 1,1-diphenly-3,4-bis(trimethylsilylmethylene)-1-silacyclopentane ( 1a ). Under thermal conditions a 1,3-sigmatropic of the methylene hydrogen occurs, yielding the s-t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2dc87adc33d94c68ad888d2176c65413
https://doi.org/10.1016/j.jorganchem.2004.11.013
https://doi.org/10.1016/j.jorganchem.2004.11.013
Publikováno v:
Tetrahedron. 56:121-127
The diallylic phosphine-borane Ph(BH3)P(allyl)26, reacts with the zirconocene ‘Cp2Zr’ and gives the bicyclocomplex intermediate 7, characterized by 1H and 31P NMR. The electrophilic addition of H+, Br2, PhPCl2(BH3), Ph2PCl(BH3) leads to the corre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9788972261a59cb84ce4bafb51808b4b
https://doi.org/10.1016/s0040-4020(99)00780-2
https://doi.org/10.1016/s0040-4020(99)00780-2
Publikováno v:
European Journal of Organic Chemistry. 1999:861-868
The reactivity of red phosphorus towards aldehydes was investigated under basic and acidic media. It was demonstrated that the real phosphorylating agent involved in the reaction was phosphane (PH3) in basic media, and hypophosphorous acid (H3PO2) in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a62c698f00a6ca7ac983b01db1b4280
https://doi.org/10.1002/(sici)1099-0690(199904)1999:4<861::aid-ejoc861>3.0.co
https://doi.org/10.1002/(sici)1099-0690(199904)1999:4<861::aid-ejoc861>3.0.co
Publikováno v:
Scopus-Elsevier
The dipropargylic derivatives of Si, Ge, P, 1a–c, react with the zirconocene entity ‘Cp2Zr’ and give the intermediate bicyclocomplexes 2a–c characterized by 1H and 31P-NMR. The electrophilic addition of H+, Br2 leads to the corresponding exo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0cbc5517bd97fdf4246273a67c16c263
https://doi.org/10.1016/s0022-328x(98)00700-1
https://doi.org/10.1016/s0022-328x(98)00700-1
Publikováno v:
Main Group Chemistry. 2:37-41
In the diphosphirane series, the substitution of one aryl group (2,4,6-tri-tert-butyl‐phenyl) by a chlorine atom leading to the trans P‐chloro-diphosphirane via the cis isomer intermediate can be readily realized in chlorinated solvent under soni
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::84a9cdde4ad8aad265a30052bfe6f276
https://doi.org/10.1080/13583149712331338859
https://doi.org/10.1080/13583149712331338859
Publikováno v:
Scopus-Elsevier
The synthesis of ortho-substituted benzoic acid 3 from benzalphthalide 1 in the presence of ‘hydriodic acid—red phosphorus’ (HIaq/Pred) occurs via the formation of benzylphthalide 2 as reaction intermediate. Its preparation is optimized by use
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2b20facbfe8ecd4be49fe0fdb17871fc
https://doi.org/10.1016/s0022-328x(96)06558-8
https://doi.org/10.1016/s0022-328x(96)06558-8
Publikováno v:
Journal of Organometallic Chemistry. 514:37-43
The unsymmetrical diphosphirane 2a , obtained by addition of dichlorocarbene to the corresponding diphosphene ArPPTsi (Ar 2,4,6,-tri-tert-butylphenyl; Tsi tris(trimethylsilyl)methyl) presents a structure with the shortest PP bond (2.117
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1980263db0f899afcf9ef2bc688cb116
https://doi.org/10.1016/0022-328x(95)06027-t
https://doi.org/10.1016/0022-328x(95)06027-t
Publikováno v:
Tetrahedron Letters. 37:3109-3112
The bis-allylic 1 and the bis-propargylic 6 derivatives react with the zirconocene “ZrCp2” and lead, after electrophilic addition, to the corresponding chiral trans heterocyclopentanes (MSi,Ge,P) 3–5 and bis-methylenecyclopentanes 8. New chi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::393614cf0df0a69dfd18ab533c970d82
https://doi.org/10.1016/0040-4039(96)00503-5
https://doi.org/10.1016/0040-4039(96)00503-5
Autor:
Max Koenig, Guita Etemad-Moghadam, Anne Zaparucha, Jacques Berlan, Maryam Mirza-Aghayan, André Loupy
Publikováno v:
Tetrahedron: Asymmetry. 6:2643-2646
Ultrasound irradiation enhances the rate and improves the yield of the heterogeneous asymmetric Michael reaction without any modification of the enantioselectivity with respect to standard procedure. These improvements are assigned to ultrasonic mech
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::31debe5f39b9fda26c917bfcc2b1c77f
https://doi.org/10.1016/0957-4166(95)00346-q
https://doi.org/10.1016/0957-4166(95)00346-q