1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → 4-Cyano-1H-pyrrole-2-carboxylic acid [2-cyclohept-1-enyl-4-(1,3-dimethyl-2-oxo-hexahydro-pyrimidin-5-yl)-phenyl]-amide

Participants

Reaction Steps

A mixture of 5-(4-amino-3-cyclohept-1-enyl-phenyl)-1,3-dimethyl-tetrahydro-pyrimidin-2-one (as prepared in Example 9, step (a), 21 mg, 0.067 mmol), 4-cyanopyrrolecarboxylic acid (Canadian J. Chem. 59: 2673 (1981)). (24.6 mg, 0.180 mmol), EDCI (19.4 mg, 0.101 mmol), HOBt (9.2 mg, 0.068 mmol), DIEA (35 μL, 0.20 mmol) in DCM (0.5 mL) was stirred at RT overnight. The reaction mixture was concentrated in vacuo and the residue was purified RP-HPLC eluting with 20% to 100% CH3CN in 0.1% TFA/H2O over 20 min on a C18 column to obtain the title compound (4.2 mg, 14%): 1H-NMR (CD3OD; 400 MHz): δ 7.58 (d, 1H, J=1.5 Hz), 7.44 (d, 1H, J=8.2 Hz), 7.15-7.24 (m, 3H), 5.93 (t, 1H, J=6.5 Hz), 3.38-3.61 (m, 5H), 2.96 (m, 6H), 2.48 (m, 2H), 2.28 (m, 2H), 1.82 (m, 2H), 1.45-1.23 (m, 4H); Mass spectrum (ESI, m/z): Calcd. for C25H29N5O2, 432.2 (M+H), found 432.2.

Provenance & Evidence