New chiral P-ligands: P-amino- and P-cycloalkoxy dibenzo[c.e][1,2]oxaphosphorines

Autor:	Kálmán Simon, Helga Szelke, György Keglevich, Krisztina Ludányi, Veronika Kudar, Tímea Imre, Miklós Hanusz, Andrea Kerényi
Rok vydání:	2005
Předmět:	Inorganic Chemistry chemistry.chemical_compound chemistry Stereochemistry Organic Chemistry Oxide Diastereomer Boranes Physical and Theoretical Chemistry Borane Optically active Single crystal Catalysis
Zdroj:	Tetrahedron: Asymmetry. 16:4015-4021
ISSN:	0957-4166
DOI:	10.1016/j.tetasy.2005.11.006
Popis:	The reaction of racemic chloro-dibenzo[c.e][1,2]oxaphosphorine with (S)-(−)-α-methyl-benzylamine and (1R,2S,5R)-(−)-menthol led to a mixture of optically active diastereomers of the corresponding phosphonous derivatives. The isomers were separated in a diastereomeric excess of 71–93% at the phosphonic oxide and/or at the phosphonous borane stage. The P(III) boranes are suitable precursors of the P-ligands. The absolute P-configuration in one of the menthyl phosphonates isolated was determined by single crystal X-ray analysis.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f3f5198f3f8eaa11a26798bf9f4d6453 https://doi.org/10.1016/j.tetasy.2005.11.006 Zobrazit plný text záznamu Full Text from ScienceDirect