4-Methylmorpholine → methyl N-[(1S)-1-[[(1S,2S)-1-benzyl-2-hydroxy-3-[[[(2S,3S)-2-(methoxycarbonylamino)-3-methyl-pentanoyl]amino]-[(4-pyrazin-2-ylphenyl)methyl]amino]propyl]carbamoyl]-2-methyl-propyl]carbamate

142 mg (0.75 mmol) of N-methoxycarbonyl-(L)-iso-leucine and 223 mg (0.75 mmol) of TPTU in 3 ml of DMF are stirred at room temperature for 10 min and then a solution of 473 mg (0.75 mmol) of 1-[4-(pyrazin-2-yl)-phenyl]-4(S)-hydroxy-2-amino-5(S)-N-(N-methoxy-carbonyl-(L)-valyl)amino-6-phenyl-2-azahexane hydrochloride (Example 40g) and 0.33 ml of NMM in 3 ml of DMF is added. The mixture is stirred at room temperature overnight. Working up is carried out by the slow, dropwise addition of the reaction mixture to 100 ml of water, stirring at room temperature for 20 min and isolation of the resulting precipitate by filtration. The precipitate is washed with water and taken up in methylene chloride; the organic phase is washed in succession with water, sat. sodium hydrogen carbonate solution/water 1:1, water and brine. After removal of the solvent, the residue is digested in ether, with the title compound being obtained in the form of a colourless powder. The compound can be lyophilised from dioxane. TLC: Rt =0.28 (ethyl acetate). HPLC20-100 : tRet =13.78. FAB MS(M+H)+ =692.

1. stirringstirring at room temperature for 20 min
2. filtrationisolation of the resulting precipitate by filtration
3. washThe precipitate is washed with water
4. washthe organic phase is washed in succession with water, sat. sodium hydrogen carbonate solution/water 1:1, water and brine
5. customAfter removal of the solvent
6. custombeing obtained in the form of a colourless powder

ORD 기록

ord-81adc052fa644d27b6193dc76d80edd3

출처 데이터셋

uspto-grants-1998_12

DOI

10.6084/m9.figshare.5104873.v1

특허 번호

US05849911