Triethylamine → ((S)-2-{7-[(4-Acetylamino-benzenesulfonylamino)-methyl]-furo[2,3-g]indazol-1-yl}-1-methyl-ethyl)-carbamic acid benzyl ester

A solution of the product from Example 17, Step B (0.32 g, 0.85 mmol) in THF (10 mL) containing triethylamine (3.39 mmol, 0.47 mL) was cooled (ice bath) and N-acetylsulfanilyl chloride (0.20 g, 0.85 mmol) was added followed by stirring for one hour. The reaction mixture was warmed to room temperature, water (1 mL) was added, and stirring continued until all the solids dissolved. Saturated aqueous sodium bicarbonate (150 mL) was added and the mixture was extracted with ethyl acetate (2×100 mL). The combined extracts were washed with brine (100 mL), dried (MgSO4) and evaporated to a residue which was purified by chromatography (silica gel, hexane/ethyl acetate gradient) to give an amorphous solid (0.32 g, 66%): LC/MS m/z 576 [M+H]+.

1. additionwas added
2. stirringstirring
3. dissolutiondissolved
4. extractionthe mixture was extracted with ethyl acetate (2×100 mL)
5. washThe combined extracts were washed with brine (100 mL)
6. dry with materialdried (MgSO4)
7. customevaporated to a residue which
8. customwas purified by chromatography (silica gel, hexane/ethyl acetate gradient)

ORD-Eintrag

ord-80149dcbc8e84e1cab98960bfb68bdfb

Quelldatensatz

uspto-grants-2009_01

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07476687B2