| http://www.w3.org/ns/prov#value | - Alternatively, the bicyclic heterocycles of Formula (IV) may be acylated by either a mixture of a strong base, such as butyl lithium, and an N,N-dialkylamide, or a mixture of Lewis acid, such as stannic chloride, and an acid anhydride, such as acetic anhydride at an elevated temperature.
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