A NEW STABLE MODIFIED BOROHYDRIDE REAGENT, EFFICIENT REDUCTION OF DIFFERENT FUNCTIONAL GROUPS WITH SULFURATED BARIUM BOROHYDRIDE [BA(BH<sub>2</sub>S<sub>3</sub>)<sub>2</sub>] IN DRY THF
作者:Habib Firouzabadi、Mahboobeh Ghadami
DOI:10.1080/10426500008076533
日期:2000.1.1
Barium and strontium sulfurated borohydrides, Ba(BH2S3)(2),Sr(BH2S3)(2) the two newly introduced modified borohydride agents, are prepared from NaBH2S3 by metathesis reaction with BaCl2 and SrCl2 in good yields. Ba(BH2S3)(2) is more stable and more reactive than Sr(BW2S3)(2) The reducing ability of Ba(BH2S3)(2) for the reduction of aldehydes, ketones, alpha,beta -unsaturared carbonyl compounds, azides, nitro compounds, and cleavage of epoxides in dry THF is described.
EFFICIENT REDUCTION OF ORGANIC COMPOUNDS WITH SULFURATED CALCIUM BOROHYDRIDE [Ca(S<sub>3</sub>BH<sub>2</sub>)<sub>2</sub>], A NEW AND STABLE MODIFIED BOROHYDRIDE REAGENT
Calcium, magnesium, and berelium borohydrides are prepared by metathetical reaction between NaBH2S3 and Ca, Mg, and Be chlorides in dry THF and the effect of metal cation exchange on their stability and reactivity has been presented. In this study we have shown that Ca(BH2S3)2 is much more stable and more reactive than its Mg, Be, and Na analogues. Ca(BH2S3)2 can easily reduce carbonylcompounds such as