1,8-Diazabicyclo(5.4.0)undec-7-ene → 7-(1,4-Diazabicyclo[3.2.1]octan-4-yl)-1-ethyl-6-fluoro-4-oxo-1,8-naphthyridine-3-carboxylic acid

Participants

Reaction Steps

A suspension of 2.06 g (6.28 mmol) 1-ethyl-7-ethanesulfonyl-6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylic acid and 1.29 g (6.97 mmol) 1,4-diazabicyclo[3.2.1]octane dihydrochloride in 30 ml acetonitrile was treated with 3.10 g (20.4 mmol) 1,8-diazabicyclo[5.4.0]undec-7-ene. The resulting solution was stirred overnight and the precipitate which formed was filtered to afford 0.40 g of the title compound, mp 228°-229° C.

Provenance & Evidence