protecting group

Teoc [2-(trimethylsilyl)ethoxycarbonyl] is one of the commonly used silyl carbamate protecting groups for amines. Its distinctive feature is that it can be removed under fluoride-triggered conditions, and it is therefore often used in multistep synthesis as an alternative to the more common ...

Ac (acetyl), Bz (benzoyl), and Tfa (trifluoroacetyl) all belong to the class of N-acyl amino protecting groups, in which an amino group is converted into an amide through acylation. Although they appear to belong to the same category, they do not play the same role in synthetic route design. The ...

In protecting-group chemistry, trityl (Trt) and its substituted derivatives—such as 4-methyltrityl (Mtt), 4-methoxytrityl (Mmt), and 4,4′-dimethoxytrityl (DMTr)—are often simply regarded as “several closely related acid-labile protecting groups.” From the standpoint of experimental ...

In multistep synthesis, the choice among benzyl-type protecting groups such as Bn, PMB, and DMB depends not only on whether they can remain stable under the reaction sequence, but more importantly on whether they can later be removed under the intended conditions and in the intended order. One ...

tert-Butyl esters are among the most commonly used protecting groups for carboxylic acids. Their long-standing importance mainly rests on two features: first, they show good stability toward a variety of nucleophiles and reducing conditions; second, they can be removed relatively conveniently ...