Pyridine → 1-Fluoropyridinium tetrafluoroborate

To a 30 ml anhydrous acetonitrile solution containing 0.71 g (8.98 mmole) of pyridine a mixed gas of fluorine and nitrogen (1:9) was introduced at a rate of 20 ml/min. at -40° C. under vigorous stirring, the amount of fluorine gas introduced being 26 mmoles. Subsequently, at the same temperature, 1 ml (8.13 mmole) of an ethereal complex of boron trifluoride as the Lewis acid was added and the resulting solution was stirred for 5 hours. The post treatment was effected as in example 13 to give 0.91 g (yield: 69%) of N-fluoropyridinium tetrafluoroborate, the physical properties of which are reproduced in Table 6.

1. additionwas introduced at a rate of 20 ml/min. at -40° C. under vigorous stirring

ORD record

ord-ee971b11e3194ee9a28135c4873b8882

Source dataset

uspto-grants-1996_03

DOI

10.6084/m9.figshare.5104873.v1

Patent number

USRE035177