Organoboranes. 55. Improved procedure for the conversion of representative achiral and chiral alkyl-,(E)-1-alkenyl and (Z)-1-alkenyl-, and arylboronates into the …

HC Brown, AM Salunkhe, AB Argade

Index: Brown, Herbert C.; Salunkhe, Ashok M.; Argade, Ankush B. Organometallics, 1992 , vol. 11, p. 3094 - 3097

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Citation Number: 10

Abstract

Diethyl alkylboronates, R* B (OEt),, of essentially 100% enantiomeric purity, prepared by asymmetric hydroboration of readily available prochiral alkenes, were effectively converted into the corresponding chiral alkyldichloroboranes, R* BC12, by treatment with boron trichloride (1 M solution in dichloromethane) in the presence of a catalytic amount of anhydrous ferric chloride (3 mol%). This reaction is quite general, proceeds well without ...