Efficient preparation of (S)- and (R)-tert-Butylmethylphosphine-Borane: a novel entry to important P-Stereogenic ligands

A novel one-pot reductive methodol. for the synthesis of optically pure tert-butylmethylphosphine-borane is reported. The prepn. uses as the starting material tert-butylmethylphosphinous acid-borane, which is available in both enantiomeric forms from cis-1,2-aminoindanol and tert-butyldichlorophosph...

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Hauptverfasser: Salomó i Prat, Ernest, Orgué Gassol, Sílvia, Riera i Escalé, Antoni, Verdaguer i Espaulella, Xavier
Format: Artikel
Sprache:eng
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Zusammenfassung:A novel one-pot reductive methodol. for the synthesis of optically pure tert-butylmethylphosphine-borane is reported. The prepn. uses as the starting material tert-butylmethylphosphinous acid-borane, which is available in both enantiomeric forms from cis-1,2-aminoindanol and tert-butyldichlorophosphine. The process is based on the redn. of a mixed anhydride, the configurational stability of which has been studied in several solvents and temps. Tetrabutylammonium borohydride was the best reducing agent allowing for the development of a practical process. To demonstrate the utility of the new methodol., the product obtained in this manner was used in the prepn. of Quinox-P*.
ISSN:0039-7881
DOI:10.1055/s-0035-1561854