Amino alcohols Q 0240A Fast Procedure for the Preparation of Vicinal Azido Alcohols Using Polymer-Supported Reagents. -A novel procedure for the preparation of α-azidoketones and β-azidoalcohols uses Amberlite IRA 900 exchange resins. Advantages of the method are faster reaction rates, ease of manipulation and formation of cleaner products. -(BRENELLI*, E. C. S.; BRENELLI, J. A.; PINTO, R. C. L.; Tetrahedron Lett. 46 (2005) 27, 4531-4533; Dep. Quim. Org., Univ. Fed. Fluminense, 24020 Niteroi, Rio de Janeiro, Brazil; Eng.) -Mais 41-076
Borohydride reduction of acetophenones was carried out with the borohydride-form of an anion exchange polystyrene-divinylbenzene resin. High yields were achieved and reaction rates were significantly increased by the addition of LiNO 3 , LiCl, LiBr or LiI without decreasing yield.
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