2-Thiophen-2-yl-piperazine → HCID 54088575, compound

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Reaction Steps

(RS)-1-Cyclopropyl-3-ethoxycarbonyl-7-fluoro-4-oxo-8-[3-(2-thienyl)-1-piperazinyl]-1,4-dihydrobenzo[b][1,8]naphthyridine was prepared under the conditions of Example 39, but starting with 1-cyclopropyl-7,8-difluoro-3-ethoxycarbonyl-4-oxo-1,4-dihydrobenzo[b][1,8]naphthyridine (1.7 g) and (RS)-2-(2-thienyl)piperazine (1 g). (RS)-1-Cyclopropyl-3-ethoxycarbonyl-7-fluoro-4-oxo-8-[3-(2-thienyl)-1-piperazinyl]-1,4-dihydrobenzo[b][1,8]naphthyridine (2.2 g) is obtained in the form of a yellow solid, m.p. 210°-212° C.

Provenance & Evidence