... HELVETICA CHIMICA ACTA - Vol. 71 (1988) ... In contrast to this, the anomeric halogenoses 1 and 2 show a reversed behavior (Table 2). Treatment of the protected p- and ct -D-ribonucleosides 4 and 5 with 10% aqueous CF,COOH gives the deprotected compounds 6 [22] and 7 ...