(1-Methylcyclobutyl)methanamine hydrochloride

CAS 1245647-53-3

One extra carbon can change a reagent's identity. In (1-methylcyclobutyl)methanamine hydrochloride, a methylene separates the nitrogen from the four-membered carbon ring. In 1-methylcyclobutan-1-amine, nitrogen attaches directly to the ring. Similar words therefore describe different connections. The hydrochloride adds another distinction: chloride is a counterion, not a chlorine substituent on the carbon skeleton. A patent on compounds investigated as muscarinic M1 receptor agonists lists the exact methanamine salt and its CAS number as a starting material, but that does not establish activity of the salt itself. The useful story is precise molecular construction. Ring position, spacer length, and protonation state each matter when matching a chemical name to a structure or deciding whether a reagent fits a documented synthetic route.