Zobrazeno 1 - 10
of 25
pro vyhledávání: '"John R. Studley"'
Autor:
John R. Studley, Jennifer A. Kenny, Mark P. Gamble, Martin Wills, Athene Smith, Matthew J. Palmer
Publikováno v:
Journal of Molecular Catalysis A: Chemical. 146:139-148
The use of (i) enantiomerically pure phosphinamides coupled to borane and (ii) an enantiomerically pure amino alcohol coupled to a transfer hydrogenation process, in the asymmetric catalysis of the reduction of ketones to alcohols, is described. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e9c0585583b0da33a87a0196ac8fd51d
https://doi.org/10.1016/s1381-1169(99)00062-x
https://doi.org/10.1016/s1381-1169(99)00062-x
Publikováno v:
Journal of the Chemical Society, Perkin Transactions 1. :1027-1038
We have identified a new class of catalysts for the asymmetric reduction of prochiral ketones by borane. Key to the architecture of effective catalysts is an N–PO structural unit which may be part of a phosphinamide, phosphonamide or a related stru
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2eb75a37ee83944aa950c9e6dccc1482
https://doi.org/10.1039/a709174e
https://doi.org/10.1039/a709174e
Autor:
John R. Studley, Nathaniel W. Alcock, Athene R.C. Simm, Martin Wills, Mark P. Gamble, Barry N. Burns
Publikováno v:
Tetrahedron: Asymmetry. 8:73-78
The effect of the configuration of the phosphorus atom in phosphinamide reduction catalysts has been studied through the preparation and use of a series of catalysts containing stereogenic phosphorus atoms of known configuration. The conclusion of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6ee5e9b852e6634e452568430cf9db35
https://doi.org/10.1016/s0957-4166(96)00482-x
https://doi.org/10.1016/s0957-4166(96)00482-x
Publikováno v:
Tetrahedron: Asymmetry. 7:3071-3074
We have designed and prepared a catalyst for the asymmetric reduction of ketones which combines a phosphinamide and a boron-containing heterocyclic ring. The former group acts to direct and activated the borane, whilst the latter provides a well defi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::25d4c4d6c13e938a27e00497c7b155d1
https://doi.org/10.1016/0957-4166(96)00400-4
https://doi.org/10.1016/0957-4166(96)00400-4
Publikováno v:
Tetrahedron Letters. 37:2853-2856
A novel class of recoverable and highly stable phosphinamide catalysts for the asymmetric reduction of ketones by borane is described. Enantiomeric excesses of up to 92% have been obtained using 10 mol% of the optimum catalyst.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d9a2ecb55776ba43782422a943a80dcb
https://doi.org/10.1016/0040-4039(96)00404-2
https://doi.org/10.1016/0040-4039(96)00404-2
Publikováno v:
Tetrahedron: Asymmetry. 5:801-804
A number of new catalysts for the asymmetric reductions of ketones by borane are described. The highest accelerations are achieved by catalysts in which the phosphinamide (R 2 NPO) unit can adopt a planar geometry. This observation has provided an in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ee1002f3626fb1e76f806857ac3ed23a
https://doi.org/10.1016/s0957-4166(00)86231-x
https://doi.org/10.1016/s0957-4166(00)86231-x
Publikováno v:
ChemInform. 25
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::428ee19d4b9956834ec9f4a882fc7deb
https://doi.org/10.1002/chin.199405037
https://doi.org/10.1002/chin.199405037
Publikováno v:
ChemInform. 25
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3c3b19f29ce30f0aed21859a67b79367
https://doi.org/10.1002/chin.199443045
https://doi.org/10.1002/chin.199443045
Publikováno v:
ChemInform. 27
A novel class of recoverable and highly stable phosphinamide catalysts for the asymmetric reduction of ketones by borane is described. Enantiomeric excesses of up to 92% have been obtained using 10 mol% of the optimum catalyst.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4630c9f516539895258adab9756e4aca
https://doi.org/10.1002/chin.199632114
https://doi.org/10.1002/chin.199632114
Autor:
John R. Studley, Athene R.C. Simm, Mark P. Gamble, Nathaniel W. Alcock, Barry N. Burns, Martin Wills
Publikováno v:
ChemInform. 28
The effect of the configuration of the phosphorus atom in phosphinamide reduction catalysts has been studied through the preparation and use of a series of catalysts containing stereogenic phosphorus atoms of known configuration. The conclusion of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::284bafd8d7c5676003d14818c95b3db8
https://doi.org/10.1002/chin.199719182
https://doi.org/10.1002/chin.199719182