4-Amino-1-Boc-piperidine → 1,1-Dimethylethyl 4-[[4-amino-5-(2,3-difluoro-6-methoxybenzoyl)-2-pyrimidinyl]amino]-1-piperidinecarboxylate

Participants

Reaction Steps

A solution of (4-amino-2-ethanesulfinyl-pyrimidin-5-yl)-(2,3-difluoro-6-methoxy-phenyl)-methanone (7.7 g, 23 mmol, Example 165) and 4-amino-1N-Boc-piperidine (6.8 g, 34 mmol, Astatech) in 30 mL of 1-methyl-2-pyrrolidinone was heated at 70° C. for 30 minutes. The reaction mixture was diluted with water and extracted with ethyl acetate. The dried (Na2SO4) organic solution was evaporated and the residue was chromatographed on silica gel. Elution with 3:2 ethyl acetate/hexane provided 80% yield of 4-[4-amino-5-(2,3-difluoro-6-methoxy-benzoyl)-pyrimidin-2-ylamino]-piperidine-1-carboxylic acid tert-butyl ester as a colorless solid, mp 114 dec., identical to material prepared in Example 106. Mass Spectrum (LR-ES) M+: 463.

Provenance & Evidence