prov:value
| - More particularly, a compound of formula (I), wherein R3 is ???COR5 is reacted with an amine of formula (VII), in the presence of a reducing agent such as sodium borohydride, sodium cyanoborohydride, sodium triacetoxyborohydride, hydrogen gas in the presence of a catalyst, and the like, in a solvent such as methanol, ethanol, 1,2-dichloroethane, trifluoroethanol, and the like, to yield the compoun
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