Deprotection of a primary Boc group under basic conditions
摘要:
Treatment of a primary t-butyl carbamate (Boc) group with excess sodium t-butoxide in slightly wet tetrahydrofuran or 2-methyltetrahydrofuran provides the corresponding primary amine in excellent yield. We believe the reaction proceeds through ail isocyanate intermediate. (C) 2003 Elsevier Ltd. All rights reserved.
Ruthenium(0)-Catalyzed sp3 C–H Bond Arylation of Benzylic Amines Using Arylboronates
摘要:
A Ru-catalyzed direct arylation of benzylic sp(3) carbons of acyclic amines with arylboronates is reported. This highly regioselective and efficient transformation can be performed with various combinations of N-(2-pyridyl) substituted benzylamines and arylboronates. Substitution of the pyridine directing group in the 3-position proved to be crucial in order to achieve high arylation yields. Furthermore, the pyridine directing group can be removed in high yields via a two-step protocol.
primary amines from carboxylic acids through a Lossen rearrangement of hydroxamicacid derivatives, which were in situ generated by the reaction of carboxylic acids with O-trimethylsilylhydroxylamine (NH2OTMS) and carbonyl diimidazole (CDI, 1.5 equiv) in dimethyl sulfoxide at room temperature, has been achieved. This one-pot method could be applied to various carboxylic acids such as aromatic, heteroaromatic
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
Chemoselective reduction of azides catalyzed by molybdenum xanthate by using phenylsilane as the hydride source
作者:Mahagundappa R. Maddani、Saravana K. Moorthy、Kandikere R. Prabhu
DOI:10.1016/j.tet.2009.10.093
日期:2010.1
A chemoselective, neutral, and efficient strategy for the reduction of azides to corresponding amines catalyzed by dioxobis(N,N,-diethyldithiocarbamato) molybdenum complex (1, MoO2[S2CNEt2]2) in the presence of phenylsilane is discovered. This chemoselective reduction strategy tolerates a variety of reducible functional groups.