反应详情

A solution of 80 mg (0.12 mmol) (R)-2-(1′-carboxymethyl-4,4′-bipiperidinyl-1-yl)-1-(4-hydroxy-3,5-dimethyl-benzyl)-2-oxo-ethyl 4-(2-oxo-1,2,4,5-tetrahydro-1,3-benzodiazepin-3-yl)-piperidine-1-carboxylate, 45 mg (0.14 mmol) TBTU and 32 μL (0.23 mmol) triethylamine in 1.2 mL DMF was stirred for 1 h at RT. Then 29 μL (0.23 mmol) 1-hexanol were added and the reaction mixture was stirred for 4 days at RT. The mixture was evaporated down i.vac., the residue was taken up in 30 mL EtOAc, the organic phase was washed with 20 mL 5% NaHCO3 solution and dried on Na2SO4. After the elimination of the desiccant and solvent the residue was purified by chromatography (silica gel, gradient DCM/isopropanol 95:5 to DCM/isopropanol 90:10). The fractions containing the product were concentrated by evaporation i. vac., the residue was triturated with DIPE, suction filtered and dried.

1. customThe mixture was evaporated down i.vac
2. washthe organic phase was washed with 20 mL 5% NaHCO3 solution
3. customdried on Na2SO4
4. customAfter the elimination of the desiccant and solvent the residue was purified by chromatography (silica gel, gradient DCM/isopropanol 95:5 to DCM/isopropanol 90:10)
5. additionThe fractions containing the product
6. concentrationwere concentrated by evaporation i
7. custom, the residue was triturated with DIPE, suction
8. filtrationfiltered
9. customdried