Chemistry is traditionally divided into organic and inorganic chemistry. Safety of Benzo[b]furan-2-carboxaldehyde, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 4265-16-1
Copper nanoparticles (mainly as Cu2O) on titania have been shown to catalyze the multicomponent synthesis of propargylamines from aldehydes, amines, and alkynes (A3 coupling) effectively at 70 C under solvent-free conditions. Both aromatic and aliphatic aldehydes and alkynes have been combined with secondary amines to provide a wide range of propargylamines in moderate to excellent yields. Two examples of ketone/amine/alkyne (KA 2) coupling are also included. The catalyst is easy to prepare, reusable at a low copper loading (0.5 mol-%), and exhibits higher catalytic activity than some commercially available copper sources. Some mechanistic aspects of the reaction have also been examined, which have unveiled the participation of copper(I) acetylides in a heterogeneous process. Copyright
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Reference：
Benzofuran – Wikipedia,
Benzofuran | C8H725O – PubChem