For the first time a one step direct conversion of aromatic hydrazines and azo compounds to N-(tert-butoxycarbonyl) amines is achieved via reductive cleavage of N-N and N=N bonds using the inexpensive and safe hydride source polymethylhydrosiloxane (PMHS) and di-tert-butyl dicarbonate [(Boc)2O] in the presence of a catalytic amount of 10% Pd-C.
Thiamine hydrochloride as a recyclable organocatalyst for the efficient and chemoselective <i>N</i>-<i>tert</i>-butyloxycarbonylation of amines
作者:Ajit P. Ingale、Dnyaneshwar N. Garad、Dattatraya Ukale、Nitin M. Thorat、Sandeep V. Shinde
DOI:10.1080/00397911.2021.1994998
日期:2021.12.17
approach has been described for the chemoselective N-tert-butyloxycarbonylation of amines under solvent-free conditions at ambient temperature. The demonstrated approach has been applicable for the N-Boc protection of variety of aliphatic, aryl, heteroaryl amines. The chemoselective protection of amino group occurs in chiral amines and amino alcohol withoutracemization in high yield. Thiamin hydrochloride
Teaching Old Compounds New Tricks: DDQ-Photocatalyzed C−H Amination of Arenes with Carbamates, Urea, and N-Heterocycles
作者:Somnath Das、Palani Natarajan、Burkhard König
DOI:10.1002/chem.201705442
日期:2017.12.22
The C-H amination of benzene derivatives was achieved using DDQ as photocatalyst and BocNH2 as the amine source under aerobic conditions and visible light irradiation. Electron-deficient and electron-rich benzenes react as substrates with moderate to good product yields. The amine scope of the reaction comprises Boc-amine, carbamates, pyrazoles, sulfonimides and urea. Preliminary mechanistic investigations
Nanoceria as an efficient and green catalyst for the chemoselective N-tert-butyloxycarbonylation of amines under the solvent-free conditions
作者:Ajit P. Ingale、Dattatraya Ukale、Dnyaneshwar N. Garad、Sandeep V. Shinde
DOI:10.1080/00397911.2021.1900256
日期:——
oxide mediated an efficient and green protocol has been described for the chemoselective N-tert-butyloxycarbonylation of amines under the solvent-freeconditions at ambient temperature. Various aliphatic, aromatic and heteroaromatic amines were protected using developed protocol and several functional groups such as alcohol, phenol and ester were well tolerated under these conditions. The rapid reaction
Sulfated tungstate: A highly efficient, recyclable and ecofriendly catalyst for chemoselective <i>N</i>-tert butyloxycarbonylation of amines under the solvent-free conditions
作者:Ajit P. Ingale、Sandeep V. Shinde、Nitin M. Thorat
DOI:10.1080/00397911.2021.1942060
日期:2021.8.18
Abstract Sulfated tungstate catalyzed an efficient and ecofriendly protocol has been described for the chemoselective N-tert-butyloxycarbonylation of amines under the solvent-freeconditions at roomtemperature. The variety of functionalized aliphatic, aromatic and heteroaromatic amines efficiently undergoes the N-tert-butyloxycarbonylation under the developed protocol. The aminoalcohol, aminophenol