Mk. Manthey et al., SYNTHESIS OF (2R)-2-BROMODEHYDROQUINIC ACID AND (2R)-2-FLUORODEHYDROQUINIC ACID, Journal of the Chemical Society. Perkin transactions. I, (5), 1997, pp. 625-628
(2R)-2-Bromodehydroquinic acid and (2R)-2-fluorodehydroquinic acid dag
ger have each been synthesised in six steps from quinic acid via the c
ommon intermediate 6, The syntheses exploit the selective protection o
f the 4-hydroxy group of the quinic acid lactone 3 with tert-butyldime
thylsilyl chloride.