Regioselective halogenation of pentono-1,4-lactones. Efficient synthesis of 5-chloro- and 5-bromo-5-deoxy derivatives
作者:Véronique Bouchez、Imane Stasik、Daniel Beaupère、Raoul Uzan
DOI:10.1016/s0008-6215(97)00044-x
日期:1997.5
Treatment of unprotected D-ribono, D-arabinono and D-xylono-1,4-lactones with either thionyl chloride or thionyl bromide in dimethylformamide led to 5-chloro- or 5-bromo-5-deoxy derivatives in 70%-95% yields. Under the same conditions, D-lyxono-1,4-lactone resulted in the 2-halogeno compounds. (C) 1997 Elsevier Science Ltd.