Water → Di-tert-butyl 1-[1-[3-(trifluoromethyl)benzyl]-2-({[3-(trifluoromethyl)benzyl]oxy}carbonyl)-1H-pyrrolo[3,2-b]pyridin-5-yl]hydrazine-1,2-dicarboxylate

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Reaction Conditions

Reaction Steps

A degassed mixture of 3-(trifluoromethyl)benzyl 5-chloro-1-[3-(trifluoromethyl)benzyl]-1H-pyrrolo[3,2-b]pyridine-2-carboxylate (3.2 g, 6.2 mmol, prepared as in Step 1), di-tert-butyl hydrazine-1,2-dicarboxylate (1.6 g, 6.9 mmol, Aldrich), dicyclohexyl(2′,4′,6′-triisopropylbiphenyl-2-yl)phosphine-(2′-aminobiphenyl-2-yl)(chloro)palladium (1:1) (0.58 g, 0.74 mmol, Aldrich) and Cs2CO3 (2.2 g, 6.9 mmol) in toluene (71 mL) was heated at 110° C. for 2 hours. Upon cooling, water was added, and the layers were separated. The aqueous layer was further extracted with three portions of EtOAc. The combined organic extracts were dried over sodium sulfate, filtered and concentrated. Flash chromatography, eluting with a gradient from 0-50% EtOAc in hexanes was used to purify the product. Yield: (0.28 g, 6% over the two steps). LCMS (M+H)+: 709.1.

Provenance & Evidence