Methylcyclopropene-lysine-Fmoc CAS:1809286-65-4 is a small molecule linker that contains several functional groups, including a lysine residue, an Fmoc (9-fluorenylmethoxycarbonyl) protecting group, and a cyclopropene group. The lysine residue in the linker provides a primary amine that can react with other molecules, such as carboxylic acids or activated esters, to form stable amide bonds. The Fmoc group is a commonly used protecting group for amines, which can be removed under mild conditions to expose the amine for further reaction. The cyclopropene group in Methylcyclopropene-lysine-Fmoc is a strained, three-membered ring that can react with strained alkynes, such as cyclooctynes or dibenzocyclooctynes, to form stable covalent bonds.
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