Enantioselective Additions of Diethylzinc and Diphenylzinc to Aldehydes Using 2-Dialkyl-aminomethyl-2‘-hydroxy- 1,1‘-binaphthyls
作者:Dong-Hyun Ko、Kyoung Hoon Kim、Deok-Chan Ha
DOI:10.1021/ol026761j
日期:2002.10.1
[reaction: see text] A set of 2-dialkylaminomethyl-2'-hydroxy-1,1'-binaphthyls was prepared and used in the catalytic asymmetric additions of diethylzinc and diphenylzinc to various types of aldehydes. These binaphthyl-based axially chiral amino alcohols show high enantioselectivity in the addition of organozincs to aromatic and aliphatic aldehydes.
Enantioselective Pd
<sup>0</sup>
‐Catalyzed C(sp
<sup>2</sup>
)–H Arylation for the Synthesis of Chiral Warped Molecules
作者:David Savary、Olivier Baudoin
DOI:10.1002/anie.202013303
日期:2021.3
address the synthesis of chiral polycyclic aromatic hydrocarbons (PAHs) and bowl‐shaped molecules, which are important target molecules in the field of organic electronic materials. Herein, we describe an enantioselective Pd0‐catalyzed C(sp2)−H arylation protocol for the synthesis of chiral fluoradenes and other warped molecules, which could serve to the bottom‐up construction of chiral PAHs. The current
Axially chiral phosphine–oxazoline ligands in the silver(I)-catalyzed asymmetric Mannich reaction of fluorinated aldimines with trimethylsiloxyfuran
作者:Qian-Yi Zhao、Zhi-Liang Yuan、Min Shi
DOI:10.1016/j.tetasy.2010.05.025
日期:2010.4
Axiallychiralphosphine–oxazolineligand L7, prepared from (S)-binol, was found to be a fairly effective chiralligand in the silver(I)-catalyzed asymmetricMannichreaction of fluorinated aldimines with trimethylsiloxyfuran to give the corresponding adducts in up to 99% yield, over 20:1 dr and 81% ee.