Montmorillonite K-10 and montmorillonite KSF as new and reusable catalysts for conversion of amines to N-(tert-butyl carbamates) was written by Chankeshwara, Sunay V.;Chakraborti, Asit K.. And the article was included in Journal of Molecular Catalysis A: Chemical in 2006.SDS of cas: 18437-66-6 This article mentions the following:
Montmorillonite K-10 and montmorillonite KSF were found to be new and reusable catalysts for chemoselective conversion of amines to N-t-Boc derivatives at room temperature under solvent-free conditions without competitive formation of isocyanate, urea and N,N-di-t-Boc. Various aromatic, heteroaromatic and aliphatic amines afforded N-(t-Bu carbamates) in excellent yields on treatment with (Boc)2O after 5 min-2 h. Chiral amine and esters of α-amino acids afforded optically pure N-t-Boc derivatives in high yields. The catalytic efficiency of montmorillonite KSF was marginally inferior to that of montmorillonite K-10. In the experiment, the researchers used many compounds, for example, tert-Butyl (4-chlorophenyl)carbamate (cas: 18437-66-6SDS of cas: 18437-66-6).
tert-Butyl (4-chlorophenyl)carbamate (cas: 18437-66-6) belongs to organic chlorides. Chlorinated organic compounds are found in nearly every class of biomolecules and natural products including alkaloids, terpenes, amino acids, flavonoids, steroids, and fatty acids. Aryl chlorides may be prepared by the Friedel-Crafts halogenation, using chlorine and a Lewis acid catalyst.SDS of cas: 18437-66-6
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics