Practical one-pot amidation of <i>N</i>-Alloc-, <i>N</i>-Boc-, and <i>N</i>-Cbz protected amines under mild conditions
作者:Wan Pyo Hong、Van Hieu Tran、Hee-Kwon Kim
DOI:10.1039/d1ra02242c
日期:——
A facile one-potsynthesis of amides from N-Alloc-, N-Boc-, and N-Cbz-protected amines has been described. The reactions involve the use of isocyanate intermediates, which are generated in situ in the presence of 2-chloropyridine and trifluoromethanesulfonyl anhydride, to react with Grignard reagents to produce the corresponding amides. Using this reaction protocol, a variety of N-Alloc-, N-Boc-, and
NOVEL TETRAAZA MACROCYCLIC COMPOUND, PREPARATION METHOD THEREOF AND USE THEREOF
申请人:Yoo Jeong Soo
公开号:US20120219495A1
公开(公告)日:2012-08-30
Provided are a cross-bridged tetraaza macrocyclic compound of a novel structure that can be used, for example, as a contrast agent for diagnostic imaging or a radiopharmaceutical and a method for preparing the same.
The disclosed tetraaza macrocyclic compound is able to form a stable metal complex at a lower temperature and allows easy conjugation with a bioactive substance or a chemically active substance, when compared to the existing cross-bridged tetraaza macrocyclic compounds.
Reductive coupling of nitroarenes with carboxylic acids – a direct route to amide synthesis
作者:Mikhail A. Losev、Andrey S. Kozlov、Vladimir B. Kharitonov、Oleg I. Afanasyev、Fedor S. Kliuev、Ludmila A. Bulygina、Natalya S. Khrushcheva、Dmitry A. Loginov、Denis Chusov
DOI:10.1039/d3ob01452e
日期:——
A straightforward and selective way for the preparation of amides from nitroarenes and carboxylicacids using carbon monoxide as a reductant was developed. This protocol does not require any non-gaseous additives, thus simplifying product isolation. Aliphatic carboxylicacid was modified in the presence of aromatic ones, and reducible functional groups such as CC, Ar–Br, and R–NO2 were saved.