Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Kamalraj V. Rajendran"'
Publikováno v:
European Journal of Organic Chemistry. 2015:5959-5965
We report LiBH4 as a preferred, simple and effective reagent for reductive boronation of achiral and racemic chlorophosphonium salts (CPS) and for diastereomeric alkoxyphosphonium salts (DAPS), both of which are, in turn, easily generated from either
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::300678be1bfd5992f487a088a981d57d
https://doi.org/10.1002/ejoc.201500521
https://doi.org/10.1002/ejoc.201500521
Publikováno v:
Chemical Communications. 51:16561-16564
A method is reported for the phosphoryl bond cleavage of O-alkyl phosphinates, phosphinothioates and certain phosphonamidates to furnish the corresponding P(III) borane adducts. The two-step procedure relies upon initial activation of the phosphoryl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8e02c0e33c4c1a6577cd086f0b494a83
https://doi.org/10.1039/c5cc06389b
https://doi.org/10.1039/c5cc06389b
Publikováno v:
Angewandte Chemie. 126:1937-1940
Synthetic routes that provide facile access to either enantiomeric form of a target compound are particularly valuable. The crystallization-free dual resolution of phosphine oxides that gives highly enantioenriched materials (up to 94 % ee) in excell
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bdffb2897dd68a8d92f2a9efaa506d35
https://doi.org/10.1002/ange.201309556
https://doi.org/10.1002/ange.201309556
Publikováno v:
Tetrahedron Letters. 54:7009-7012
A wide selection of phosphine activators has been screened to improve the selection process in the asymmetric Appel reaction. Of the activators screened, hexachloroacetone (HCA) gave the highest selectivity with excellent yield, but at least one of i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cae7d50d334a531a57415f061f79f9f3
https://doi.org/10.1016/j.tetlet.2013.10.044
https://doi.org/10.1016/j.tetlet.2013.10.044
Publikováno v:
Chemistry - A European Journal. 19:14210-14214
In contrast to tertiary phosphine oxides, the deoxygenation of aminophosphine oxides is effectively impossible due to the need to break the immensely strong and inert PO bond in the presence of a relatively weak and more reactive PN bond. This
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::235a56e2e148ccfb37cfbfdfa998e9cd
https://doi.org/10.1002/chem.201302907
https://doi.org/10.1002/chem.201302907
Publikováno v:
European Journal of Organic Chemistry. 2012:2720-2723
An efficient one-pot synthesis has been developed of enantioenriched P-stereogenic phosphanes and phosphane boranes from the corresponding racemic phosphanes in excellent yield under asymmetric Appel conditions. The chiral auxiliary (menthol) can als
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4c55eda695a00d62c20d46f9210a39ca
https://doi.org/10.1002/ejoc.201200285
https://doi.org/10.1002/ejoc.201200285
Publikováno v:
European Journal of Organic Chemistry. 2010:5642-5649
The effects of aryl ring substitution on the dynamic resolution of aryl(methyl)phenylphosphanes under asymmetric Appel reaction conditions have been studied. As expected, substitution at the ortho position strongly affects the degree ofstereoselectio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2e2ffb9590ed45e4fbbf6f5cbdbecf20
https://doi.org/10.1002/ejoc.201000733
https://doi.org/10.1002/ejoc.201000733
Publikováno v:
ChemInform. 46
We report LiBH4 as a preferred, simple and effective reagent for reductive boronation of achiral and racemic chlorophosphonium salts (CPS) and for diastereomeric alkoxyphosphonium salts (DAPS), both of which are, in turn, easily generated from either
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a8809fc16c4a7bc46f93c00e1c96d47e
https://doi.org/10.1002/chin.201550176
https://doi.org/10.1002/chin.201550176
Publikováno v:
Journal of the American Chemical Society. 137(29)
The dynamic resolution of tertiary phosphines and phosphine oxides was monitored by NMR spectroscopy. It was found that the stereoselectivity is set during the formation of the diastereomeric alkoxyphosphonium salts (DAPS), such that their initial di
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ffa3c8f761f9f1467579035986412ba8
https://pubmed.ncbi.nlm.nih.gov/26186272
https://pubmed.ncbi.nlm.nih.gov/26186272
Publikováno v:
ChemInform. 45
The method represents the first example for a dual chiral resolution of a racemic substrate being based on stereochemical bifurcation of an intermediate obtained with a single chiral auxiliary.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5d04dbcede88bb4168ce87d5c690d6c3
https://doi.org/10.1002/chin.201432201
https://doi.org/10.1002/chin.201432201