Synthesis of Sb-chiral organoantimony(III) compounds: Stepwise nucleophilic displacement reaction of tribromostibane via a bisethynylstibane intermediate
N. Kakusawa et al., Synthesis of Sb-chiral organoantimony(III) compounds: Stepwise nucleophilic displacement reaction of tribromostibane via a bisethynylstibane intermediate, SYNLETT, (10), 2000, pp. 1503-1505
Treatment of bis(1-phenylethynyl)-p-tolylstibanes 2 with Grignard reagents
resulted in nucleophilic displacement of one ethynyl group on 2 to afford t
he monoethynyl compounds 3 on which the remaining ethynyl group could be re
placed with other substituents by treatment with Grignard or organolithium
reagents. These stepwise reactions provide an efficient method for the prep
aration of a wide range of Sb-chiral organoantimony(III) compounds.