1,2-Dichloroethane → 1-[4-(Thiazol-5-yl)-phenyl]-4(S)-hydroxy-2-N-(N-ethoxycarbonyl-(L)-valyl)-amino-5(S)-N-(N-methoxycarbonyl-(L)-iso-leucyl)amino-6-phenyl-2-azahexane

Participants

Reaction Steps

Analogously to Example 7, 175 mg (0.92 mmol) of N-ethoxycarbonyl-(L)-valine, 332 mg (1.7 mmol) of EDC and 156 mg (1.15 mmol) of HOBT in 2.5 ml of DMF and 483 μl (3.47 mmol) of TEA are reacted with 0.578 mmol of 1-[4-(thiazol-5-yl)-phenyl]-4(S)-hydroxy-2-amino-5(S)-N-(N-methoxycarbonyl-(L)-iso-leucyl)amino-6-phenyl-2-azahexane (Example 11b) in 5.2 ml of DMF to form the title compound: m.p: 200-203° C.; HPLC20-100: tRet=14.6; FAB MS (M+H)+=711.

Provenance & Evidence