1,2-Dichloroethane → methyl N-[(2S)-1-[2-[(2S,3S)-2-hydroxy-3-[[(2S)-2-(methoxycarbonylamino)-3-methylbutanoyl]amino]-4-phenylbutyl]-2-[[4-(1,3-thiazol-2-yl)phenyl]methyl]hydrazinyl]-3-methyl-1-oxobutan-2-yl]carbamate

Participants

Reaction Steps

Analogously to Example 7, 140 mg (0.80 mmol) of N-methoxycarbonyl-(L)-valine, 288 mg (1.5 mmol) of EDC and 135 mg (1.0 mmol) of HOBT in 2.2 ml of DMF and 418 μl (3.0 mmol) of TEA are reacted with 0.5 mmol of 1-[4-(thiazol-2-yl)-phenyl]-4(S)-hydroxy-2-amino-5(S)-N-(N-methoxycarbonyl-(L)-valyl)amino-6-phenyl-2-azahexane in 4.5 ml of DMF to form the title compound: m.p: 207°-210° C.; HPLC20-100 : tRet =13.8; FAB MS (M+H)+ =683.

Provenance & Evidence