Diisopropylethylamine → 4-Cyano-1-(2-trimethylsilanyl-ethoxymethyl)-1H-imidazole-2-carboxylic acid [2-cyclohex-1-enyl-4-(2,6-dioxo-piperidin-4-yl)-phenyl]-amide

Participants

Reaction Steps

A solution of 73.5 mg (0.259 mmol) of 4-(4-amino-3-cyclohex-1-enyl-phenyl)-piperidine-2,6-dione (as prepared in the previous step) in CH2Cl2 (20 mL) was treated with 64.4 mg (0.388 mmol) of PyBroP, 86.8 mg (0.284 mmol) of 4-cyano-1-(2-trimethylsilanyl-ethoxymethyl)-1H-imidazole-2-carboxylate potassium salt (as prepared in this Example, step (d)), and 135 μL (0.775 mmol) of DIEA at RT for 2 h. The mixture was diluted with CH2Cl2 (50 mL) and washed with saturated aqueous NaHCO3 (2×30 mL). The organic layer was dried (MgSO4) and concentrated in vacuo to afford 70.0 mg (51%) of the title compound as an off-white solid: Mass spectrum (ESI, m/z): Calcd. for C28H35N5O4Si, 534.3 (M+H). found 534.2.

Provenance & Evidence