... 9, −500 ± 8, 550 ± 170, 1.6 ± 0.1, 17 ± 2, 215 ± 30, 245 ± 40, 18 ± 10, 16 ± 6. ... to a further compound (8) made use of the vicarious nucleophilic substitution (VNS) strategy reported by Makosza and Bialecki 20 ... a Conditions: (a) Me 2 SO 4 , K 2 CO 3 ; (b) NaBH 4 ; (c) NaOH and then ...