General solvent-free highly selective N-tert-butyloxycarbonylation strategy using protic ionic liquid as an efficient catalyst
作者:Swapan Majumdar、Jhinuk De、Ankita Chakraborty、Dilip K. Maiti
DOI:10.1039/c4ra02670e
日期:——
transformation of amines to tert-butyloxycarbonyl protected derivatives (NHBoc) using Boc2O and imidazolium trifluoroacetate protic ionic liquid (5–20 mol%). Unwanted side products such as isocyanate, urea or N,N-di-Boc were not detected. The scope of the protection strategy was successfully explored for substrate alcohols, phenols and thiol at elevated temperatures. Optically pure amino acids, amino acid esters
A protic ionic liquid catalyzed strategy for selective hydrolytic cleavage of tert-butyloxycarbonyl amine (N-Boc)
作者:Swapan Majumdar、Jhinuk De、Ankita Chakraborty、Dipanwita Roy、Dilip K. Maiti
DOI:10.1039/c4ra13419b
日期:——
efficient strategy for selective hydrolytic cleavage of the N-tert-butyloxycarbonyl (Boc) group is devised using a protic ionic liquid as an efficient catalyst. The deprotection reaction proceeded well for N-Bocprotected aromatic, heteroaromatic, aliphatic compounds, and chiral amino acid esters and peptides. A wide range of labile protectinggroups such as tert-butylester, tert-butyl ether, benzyloxycarbonyl