Vinylation of a Secondary Amine Core with Calcium Carbide

We developed a simple and efficient strategy to access N-vinyl secondary amines of various naturally occurring materials using readily available solid acetylene reagents (calcium carbide, KF, and KOH). Pyrrole, pyrazole, indoles, carbazoles, and diarylamines were successfully vinylated in good yields. Cross-linked and linear polymers were synthesized from N-vinyl carbazoles through free radical and cationic polymerization. Post-modification of olanzapine (an antipsychotic drug substance) was successfully performed.

Reference: Molecules, 2018, 23, 648

DOI: 10.3390/molecules23030648

On-line version: http://www.mdpi.com/1420-3049/23/3/648