Synthesis of Highly Substituted Unsymmetrical 1,2-Diamines, 1,2-Diimines, Imidazolium Salts and Imidazolylidenes by Aldimine Cross-Coupling
作者:Till Opatz、Coralie Kison
DOI:10.1055/s-2006-950237
日期:2006.11
compounds can directly be oxidized to 1,2-diimines or reduced to 1,2-diamines in a one-pot reaction. 1,2-Diamines can be obtained in high diastereoselectivity by reduction of the 1,2-diimines. In this case, the relative configuration of the products can be chosen depending on the reduction conditions. Cyclization of the unsymmetrical diimines with halomethyl ethers or esters leads to 1,3,4,5-tetrasubstituted
Synthesis of 1,2-Disubstituted Indoles from α-Aminonitriles and 2-Halobenzyl Halides
作者:Anne-Katrin Bachon、Till Opatz
DOI:10.1021/acs.joc.5b02659
日期:2016.3.4
The α-alkylation of deprotonated Strecker products derived from primary amines and aromatic aldehydes with 2-halobenzyl halides furnishes intermediates that can be cyclized to 1,2-disubstituted indoles in moderate to high yields (up to 94% over two steps) by microwave-assisted copper- or palladium-catalyzed intramolecular cross-coupling.
Modular Synthesis of Tetrasubstituted Imidazoles and Trisubstituted Oxazoles by Aldimine Cross-Coupling
作者:Coralie Kison、Till Opatz
DOI:10.1002/chem.200802175
日期:2009.1.12
From five to two: The addition of deprotonated Strecker products to N‐acylimines permits the synthesis of tetrasubstituted imidazoles or trisubstituted oxazoles in three or four steps, respectively. In total, the target compounds are prepared from two aldehydes, a primary amine, an acid chloride and ammonia (see scheme).
Synthesis of <b>γ</b>-Amino Acid Esters by 1,4-Addition of Deprotonated <b>α</b>-Aminonitriles and <b>α</b>-(Alkylideneamino)nitriles to <b>α</b>,<b>β</b>-Unsaturated Esters
作者:Till Opatz、Ines Bergner
DOI:10.1055/s-2007-965937
日期:2007.3
α-Aminonitriles and α-(alkylideneamino)nitriles can serve as readily available α-aminocarbanion equivalents. Their conjugate addition to α,β-unsaturated esters followed by reduction furnishes polysubstituted γ-amino acid esters in moderate to high yield.