tert-Butyl 4-oxopiperidine-1-carboxylate → HCID 86623559, compound

Participants

Reaction Steps

(2-Chloro-4-morpholin-4-yl-thieno[3,2-d]pyrimidin-6-ylmethyl)-methylamine was reacted with 1-tert-butyl 4-oxo-1-piperidinecarboxylate using standard reductive amination conditions. The resulting crude solid was triturated with diethylether to give 4-[(2-chloro-4-morpholin-4-yl-thieno[3,2-d]pyrimidin-6-ylmethyl)-methyl-amino]-piperidine-1-carboxylic acid tert-butyl ester as an off white solid (72% yield), which was reacted with 5-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-pyrimidin-2-ylamine according to General Procedure A. The resulting solid was stirred in a solution of 2N HCl (5 ml) and methanol (5 ml) overnight, before the solution was evaporated in vacuo to remove the methanol and the acidic solution made basic with sat. aq. K2CO3. The resulting solid was filtered and washed with diethyl ether to give 342 as a solid (52% yield). NMR (CDCl3, 400 MHz), 1.48-1.55 (3H, m), 1.86 (2H, d, J=12.7), 2.38 (3H, s), 2.58-2.64 (3H, m), 3.18 (2H, d, J=12.2), 3.88-3.91 (4H, m), 3.94 (2H, s), 4.03-4.06 (4H, m), 5.23 (2H, br s), 7.28 (1H, s), 9.30 (2H, s). MS: (ESI+): MH+=441

Provenance & Evidence