4,6-Dichloro-5-pyrimidinecarbaldehyde → 4-(4-Chloro-pyrazolo[3,4-d]pyrimidin-1-yl)-piperidine-1-carboxylic acid isopropyl ester

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Reaction Steps

4-(4-Chloro-pyrazolo[3,4-d]pyrimidin-1-yl)-piperidine-1-carboxylic acid isopropyl ester was prepared from the reaction of 4-hydrazino-piperidine-1-carboxylic acid isopropyl ester (Intermediate 10) and 4,6-dichloro-pyrimidine-5-carbaldehyde (Intermediate 16) using the procedure described for 4-chloro-1-[4-(3-isopropyl-[1,2,4]oxadiazol-5-yl)-cyclohexyl]-1H-pyrazolo[3,4-d]pyrimidine (Intermediate 23). The product was purified by flash chromatography eluting with 40% ethyl acetate/hexanes to give 4-(4-chloro-pyrazolo[3,4-d]pyrimidin-1-yl)-piperidine-1-carboxylic acid isopropyl ester as a white solid. Mass spectrum M+=323.0.

Provenance & Evidence