反应详情

A solution of 15.7 parts of cis-4-amino-5-chloro-N-[1-(cyanomethyl)-3-methoxy-4-piperidinyl]-2,3-dihydro-7-benzofurancarboxamide in 178 parts of tetrahydrofuran and 158 parts of methanol was hydrogenated at normal pressure and at room temperature with 6 parts of Raney nickel. After the calculated amount of hydrogen was taken up, the catalyst was filtered off and the filtrate was evaporated. The residue was purified by column chromatography (silica gel; CH2Cl2 /CH3OH(NH3) 93:7). The eluent of the desired fraction was evaporated and the residue was crystallized from acetonitrile (to which a few drops of water were added). The product was filtered off at 0° C. and dried in vacuo at 40° C., yielding 8.5 parts (53.6%) of cis-4-amino-N-[1-(2-aminoethyl)-3-methoxy-4-piperidinyl]-5-chloro-2,3-dihydro-7-benzofurancarboxamide (comp. 35).

1. filtrationthe catalyst was filtered off
2. customthe filtrate was evaporated
3. customThe residue was purified by column chromatography (silica gel; CH2Cl2 /CH3OH(NH3) 93:7)
4. customThe eluent of the desired fraction was evaporated
5. customthe residue was crystallized from acetonitrile (to which a few drops of water were added)
6. filtrationThe product was filtered off at 0° C.
7. customdried in vacuo at 40° C.