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HClO4-SiO2 as a new, highly efficient, inexpensive and reusable catalyst for N-tert-butoxycarbonylation of amines.

Organic & biomolecular chemistry (2006-07-11)
Asit K Chakraborti, Sunay V Chankeshwara
ABSTRACT

Perchloric acid adsorbed on silica-gel (HClO4-SiO2) was found to be a new, highly efficient, inexpensive and reusable catalyst for chemoselective N-tert-butoxycarbonylation of amines at room temperature and under solvent-free conditions.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Di-tert-butyl dicarbonate, ReagentPlus®, 99%
Sigma-Aldrich
Di-tert-butyl dicarbonate, ≥98.0% (GC)
Sigma-Aldrich
Di-tert-butyl dicarbonate, ReagentPlus®, ≥99%
Sigma-Aldrich
Di-tert-butyl dicarbonate solution, 1.0 M in THF
Sigma-Aldrich
Di-tert-butyl dicarbonate solution, 2 M in methylene chloride
Sigma-Aldrich
Di-tert-butyl dicarbonate solution, 2 M in THF