You talk about a DIY photoresist, but there are many types, and without some spepcifc reference to the type you describe, it is hard to answer.
Also, t-Boc groups are commonly used to protect amines, not acids, so that makes no sense to me. If you wanted to protect an alcohol polymer, you
might use tert-butyl esters, but not a t-Boc group. And I am not aware of them being light sensitive, whereas many other protecting groups are light
sensitive. Thus, it is hard to understand the question. And benzyl esters won't work for photo resists either.
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