Room temperature allyl ester and alloc deprotections – what is the lifetime of Palladium?

In a previous post, I did some work evaluating the efficiency of alloc removal with tetrakis palladium using microwave assistance and atmospheric conditions, which worked beautifully.  Given the known sensitivity of palladium catalysts (see Derek Lowe’s post for a humorous dialogue), I sought to further explore the sensitivity of palladium towards the alloc removal in the context of a peptide.

In this post, I’ll explore a variety of atmospheric, room temperature alloc deprotection conditions aimed at evaluating the catalytic lifetime of palladium tetrakis for effective alloc removal.

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