Ammonium hydroxide as the ultimate amino source for the synthesis of N-unprotected 3-tetrasubstituted aminooxindoles via catalyst-free direct amination
A Concise Synthesis of Sterically Hindered 3-Amino-2-Oxindoles
作者:Stephen J. O’Connor、Zheng Liu
DOI:10.1055/s-2003-42074
日期:——
2-pyridylalanine as the aminoacid starting materials, while 3-pyridylalanine and O-methyltyrosine are less efficiently arylated. Sterically hindered aminoacids such as valine and phenylglycine are for all practical purposes, not substrates for the key nucleophilic substitution reaction. The resulting 3-alkyl-3-amino-2-oxindoles are important intermediates for the preparation of drug-like substances.
Novel 3,3-disubstituted oxindole derivatives. Synthesis and evaluation of the anti-proliferative activity
作者:Michael S. Christodoulou、Ferdinando Nicoletti、Katia Mangano、Maria Assunta Chiacchio、Giorgio Facchetti、Isabella Rimoldi、Egle M. Beccalli、Sabrina Giofrè
DOI:10.1016/j.bmcl.2019.126845
日期:2020.1
3,3-Disubstituted oxindole derivatives bearing a nitrogen atom at the C-3 position have been synthesized starting from 3-alkyl oxindole through a metal free pathway. These derivatives have been tested in five human tumor cell lines (PC3, MCF7, SW620, MiaPaca2 and A375) and on primary cells (PBMCs) from healthy donors providing compound 6d showing a strong anticancer effect in all cancer lines on the
Ammonium hydroxide as the ultimate amino source for the synthesis of <i>N</i>-unprotected 3-tetrasubstituted aminooxindoles <i>via</i> catalyst-free direct amination
The direct use of ammonium hydroxide in amination for the synthesis of primary amines is considered to be one of the major challenges in synthetic organic chemistry.