1-Chloroisoquinoline-7-carboxylic acid → 2'-tert-butyl-1-(1-chloroisoquinoline-7-carbonyl)-4',6'-dihydrospiro[piperidine-4,5'-pyrazolo[3,4-c]pyridin]-7'(2'H)-one

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Reaction Steps

The title compound was prepared by a method analogous to that described for Example 2, using 2′-tert-butyl-4′,6′-dihydrospiro[piperidine-4,5′-pyrazolo[3,4-c]pyridin]-7′(2′H)-one hydrochloride salt (Intermediate 4) and 1-chloroisoquinoline-7-carboxylic acid, and omitting 4-dimethylaminopyridine. +ESI (M+H) 452.3; 1H NMR (400 MHz, CDCl3, δ): 8.37 (s, 1H), 8.32 (d, J=5.7 Hz, 1H), 7.89 (d, J=8.4 Hz, 1H), 7.75-7.79 (m, 1H), 7.62 (d, J=5.7 Hz, 1H), 7.39 (s, 1H), 6.42 (s, 1H), 3.43-3.73 (m, 4H), 2.87 (s, 2H), 1.64-2.01 (m, 4H), 1.61 (s, 9H).

Provenance & Evidence