Hey people,
I am looking for a base cleavable protecting group that fulfill the following features:
1. Cleavable under NaOH but not under nucleophilic bases (piperidine or DIPEA)
2. Stable under TFA.
3. Easy to remove. No long reaction times.
I was thinking in TFA as a protecting group, but I think that it is really hard to removed and u need long reaction times.
Any suggestion?