| http://www.w3.org/ns/prov#value | - d, for example by reaction with BH3 in THF. In the case where R3 is a methyl, it is preferable to react the amines (VII) with tert-butyl dicarbonate, (BOC)2 O, or with a mixture of formic acid and acetic anhydride, giving respectively the carbamate (VIIa, Z???OtBu) or the formamide (VIIa, Z???H), which products are then reduced, for example with LiAlH4, to give the amines (VIIb, R3 ???CH3).
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