New indane derived aminoalcohols as chiral ligands for the catalytic enantioselective addition of diethylzinc to aldehydes
摘要:
Secondary amines react with (1R,2S)-indene oxide 1 in a completely regioselective manner leading to trans-2-dialkylamino-1-indanols 4a-d in high yield. A Mitsunobu inversion via the corresponding p-nitrobenzoates, followed by reduction with DIBALH leads to the cis-2-dialkylamino-1-indanols 5a-d also in high yield. These two new classes of aminoindanols have been tested as chiral ligands for the enantioselective addition of diethylzinc to both aliphatic and aromatic aldehydes, leading to 1-substituted 1-propanols with up to 80% e.e. A very simple procedure for the enantiomeric enrichment of 1 from 88% to greater than or equal to 99% e.e. is also reported. (C) 1997 Elsevier Science Ltd.
Exploring Structural Diversity in Ligand Design: The Aminoindanol Case
作者:Sergi Rodríguez-Escrich、Lluís Solà、Ciril Jimeno、Carles Rodríguez-Escrich、Miquel A. Pericàs
DOI:10.1002/adsc.200800420
日期:2008.10.6
A series of enantiopure ligands based on the aminoindanol scaffold, but differing in regio- and stereochemistry has been synthesized. These ligands have been conveniently derivatized and their catalytic efficiency in different enantioselective reactions has been screened to determine privileged candidates with respect to regio- and stereochemistry for each considered process. The nature of the amino
New indane derived aminoalcohols as chiral ligands for the catalytic enantioselective addition of diethylzinc to aldehydes
作者:Lluís Solà、Anton Vidal-Ferran、Albert Moyano、Miquel A. Pericàs、Antoni Riera
DOI:10.1016/s0957-4166(97)00163-8
日期:1997.5
Secondary amines react with (1R,2S)-indene oxide 1 in a completely regioselective manner leading to trans-2-dialkylamino-1-indanols 4a-d in high yield. A Mitsunobu inversion via the corresponding p-nitrobenzoates, followed by reduction with DIBALH leads to the cis-2-dialkylamino-1-indanols 5a-d also in high yield. These two new classes of aminoindanols have been tested as chiral ligands for the enantioselective addition of diethylzinc to both aliphatic and aromatic aldehydes, leading to 1-substituted 1-propanols with up to 80% e.e. A very simple procedure for the enantiomeric enrichment of 1 from 88% to greater than or equal to 99% e.e. is also reported. (C) 1997 Elsevier Science Ltd.