In DCC coupling reaction of acid and alcohol, DCU is formed but many times DCU was not formed, the reaction did not give any product. Why?

03 October 2022 0 3K Report

I was doing a DCC coupling reaction of an acid and alcohol, and sometimes a product formed, but many times DCU has not formed even in addition of 1 equivalent of DMAP or HoBT. Why was this happening?

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