Homework Answers
In dipeptide synthesis, amines are commonly protected by – FMOC ( fluorenylmethyloxycarbonyl) , Cbz ( carboxybenzyl) BOC (tertiary butyl oxy carbonyl) groups.
The FMOC group is added using the compound FMOC-Cl, Cbz is added using Cbz-Cl and BOC is added using BOC anhydride ( BOC)2O. These reagents are all accompanied with a base ( eg: Et3N)
Their structures are :
So, compound II is the answer.
The rest of them don't react / are not easily removed during deprotection.
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