Sodium triacetoxyborohydride → tert-Butyl 7-{2-[1-(2-amino-pyrimidin-4-yl)-ethylamino]-benzoylamino}-4,4-dimethyl-3,4-dihydro-1H-isoquinoline-2-carboxylate

Participants

Reaction Conditions

Reaction Steps

To a solution of 1-(2-amino-pyrimidin-4-yl)-ethanone (Step B, 200 mg, 1.46 mmol) in toluene (15 mL) was added, 7-(2-amino-benzoylamino)-4,4-dimethyl-3,4-dihydro-1H-isoquinoline-2-carboxylic acid tert-butyl ester (Example 15, Step A)(288 mg, 0.73 mmol), and HOAc (3 drops). The resulting mixture was heated at 95° C. under N2 for 20 h. The reaction was cooled to RT and NaBH(OAc)3 (620 mg, 2.92 mmol) was added and reheated for 3 h. The reaction was cooled to RT, quenched with Na2CO3 solution (2 M, 5 mL), solvent was evaporated in vacuo. The residue was extracted with CHCl3. The organic layer was washed with saturated NaHCO3, water, brine, dried over MgSO4, and evaporated in vacuo. The crude solid was purified by chromatography on silica gel. Elution with CH2Cl2:MeOH (95:5) gave THE final compound. MS m/z: 517.3 (M+H). Calc'd. for C29H37N6O3-517.63.

Provenance & Evidence