Reaction #11057

Reaction equation

intermediate 1k

(6S)-[(4-{[(3-benzylamino-4-oxo-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidine-6-carbonyl)-amino]-methyl}-phenyl)-imino-methyl]-carbamic acid tert-butyl ester

intermediate 1j

(S)-[(4-{[(3-amino-4-oxo-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidine-6-carbonyl)-amino]-methyl}-phenyl)-imino-methyl]-carbamic acid tert-butyl ester

cyclopentanone

NaBH(OAc)3

→

intermediate 6a

Yield 57.3%

(S)-[(4-{[(3-cyclopentylamino-4-oxo-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidine-6-carbonyl)-amino]-methyl}-phenyl)-imino-methyl]-carbamic acid tert-butyl ester

Yield 57.3%

Conditions

Procedure

Following a procedure similar to that for the preparation of intermediate 1k, intermediate 1j (115.2 mg, 0.27 mmol), cyclopentanone (68.1 mg, 0.81 mmol) and NaBH(OAc)3 (217.5 mg, 1.03 mmol) yielded 76.5 mg (57.3%) of intermediate 6a. MS (ESI) 496.1 (M+H+).

Source