A) Amides can be prepared by \[RCOCl\]and anhydrides.
B) Anhydrides can be prepared by esters.
C) Azides can be prepared by anhydrides.
D) \[RCOCl\]can be prepared by anhydrides and amides.
Correct Answer: A
Solution :
[a] Nucleophilic acyl substitution order: \[Acid\text{ }halide>Azide>Anhydride>Ester>Amide\] A more reactive derivative may be used to prepare a less reactive derivative by reaction.
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