Sodium triacetoxyborohydride → HCID 69519504, compound

Participants

Reaction Conditions

Reaction Steps

A dry 3-necked, round bottomed flask, equipped with a magnetic stirrer, nitrogen inlet and cold bath was charged with 10.0 g of 2-(1-amino-2-methyl-propyl)-3-benzyl-7-chloro-3 H-quinazolin-4-one (a compound of Formula 301 prepared, e.g., as described in Example 1.6 or 3.1), 50 mL of DCM and 6.20 g (1.2 eq) of sodium triacetoxyborohydride and cooled to 10° C., followed by the portionwise addition of N-Boc-3-aminopropanal 7.1 g (1.4 eq). Upon indication of completion by TLC, the reaction was quenched with 2.0 mL of methanol and stirred for an additional 30 minutes, during which a slight exotherm was observed. The mixture was washed with 1N hydrochloric acid (until the aqueous layer was clear and acidic)(also exothermic) and then washed with 2N sodium hydroxide (until basic), followed by drying over sodium sulfate, and filtration. The resulting off-white foam solid was filtered and solvents partially stripped under vacuum to give 16.0 g (110% yield) of the title compound of Formula 302, {3-[1-(3-benzyl-7-chloro-4-oxo-3,4-dihydro-quinazolin-2-yl)-2-methyl-propylamino]-propyl}-carbamic acid tert-butyl ester.

Provenance & Evidence