N-Hydroxyphthalimide → HCID 86694001, compound

Participants

Reaction Steps

To a mixture of 2-hydroxy-1H-isoindole-1,3(2H)-dione (2.95 g, 18.1 mmol), tert-butyl 4-hydroxy-1-methyl-1,4,5,7-tetrahydro-6H-pyrazolo[3,4-c]pyridine-6-carboxylate 135 (US2005/245505 A1, 2.29 g, 9.04 mmol) and triphenylphosphine (4.74 g, 18.1 mmol) in THF (100 mL) was added DIAD (3.85 mL, 19.9 mmol) slowly at room temperature. The resulting mixture was stirred at room temperature overnight and concentrated to provide a residue which was subjected to chromatography to give 136 (2.5 g, 35%) as a yellow solid.

Provenance & Evidence