In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called SmI2-catalysed cyclization cascades by radical relay, published in 2019-03-31, which mentions a compound: 16400-32-1, Name is 1-Bromo-2-pentyne, Molecular C5H7Br, Application of 16400-32-1.
Radical cyclization cascades that are catalyzed by SmI2 and exploit a radical relay/electron-catalysis strategy have been developed. The approach negates the need for a super-stoichiometric co-reductant and requires no additives. Complex cyclic products e.g., I, including products of dearomatization, containing up to four contiguous stereocenter are obtained in excellent yield. Mechanistic studies support a single-electron-transfer radical mechanism. This strategy provides a long-awaited solution to the problem of how to avoid the need for stoichiometric amounts of SmI2 and establishes a conceptual platform on which other catalytic radical processes using the ubiquitous reducing agent can be built.
There is still a lot of research devoted to this compound(SMILES：CCC#CCBr)Application of 16400-32-1, and with the development of science, more effects of this compound(16400-32-1) can be discovered.
Reference:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics