Chankeshwara, Sunay V. ; Chakraborti, Asit K. (2006) Montmorillonite K 10 and montmorillonite KSF as new and reusable catalysts for conversion of amines to N-tert-butylcarbamates Journal of Molecular Catalysis A: Chemical, 253 (1-2). pp. 198-202. ISSN 1381-1169
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/j.molcata.2006.03.042
Abstract
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-butylcarbamates 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.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Montmorillonite K 10; Montmorillonite KSF; Catalyst; N-tert-Butylcarbamates; Amines; Chiral α-Amino Acid Esters; Di-tert-butyl dicarbonate; Chemoselective; Solvent-Free; Room Temperature |
| ID Code: | 100441 |
| Deposited On: | 20 Jan 2017 05:41 |
| Last Modified: | 20 Jan 2017 05:41 |
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