Reduction of 3‐Acyl Derivatives of Oxindoles, Benzo[b]furan‐2‐ones, and Benzo[b]thiophen‐2‐ones to the Corresponding Alkyl Derivatives by Sodium Borohydride–Acetic Acid
作者:Francis X. Smith、Brian D. Williams、Eric Gelsleichter、Judy A. Podcasy、John T. Sisko、David M. Hrubowchak
DOI:10.1080/00397910500449583
日期:2006.4.1
Abstract It was found that 3‐acyl derivatives of oxindoles, benzo[b]furan‐2‐ones, and benzo[b]thiophen‐2‐ones could be efficiently and conveniently reduced to the corresponding alkyl derivatives by pelletized sodium borohydride in acetic acid. A typical procedure involves heating the acylated substrates for approximately 90 min in a slurry of glacial acetic acid and sodium borohydride to provide the
In situ generation of ion-paired chiral ligands: rapid identification of the optimal ligand for palladium-catalyzed asymmetric allylation
作者:Kohsuke Ohmatsu、Yoshiyuki Hara、Takashi Ooi
DOI:10.1039/c4sc01032a
日期:——
of ion-paired chiral ligands from simple salts of ammonium phosphines and chiral Brønsted acids under phase-transfer conditions is established. The exploitation of this method in combinatorial ligand screening has enabled the rapid identification of the optimal ion-paired chiral ligand for the palladium-catalyzed asymmetric allylicalkylation of benzo[b]thiophen-2(3H)-ones.
一种用于该方法在原位被建立代从相转移条件下铵膦和手性布朗斯台德酸的简单的盐离子配对的手性配体。该方法在组合配体筛选中的应用使得能够快速确定用于钯催化的苯并[ b ]噻吩-2(3 H)-ones的不对称烯丙基烷基化的最佳离子对手性配体。