Synthesis of α-Amidoketones through the Cascade Reaction of Carboxylic Acids with Vinyl Azides under Catalyst-Free Conditions
作者:Cai Gao、Qianting Zhou、Li Yang、Xinying Zhang、Xuesen Fan
DOI:10.1021/acs.joc.0c01871
日期:2020.11.6
An efficient synthesis of α-amidoketone derivatives through the cascade reactions of carboxylicacids with vinyl azides is presented. Compared with literature protocols, notable features of this new method include catalyst-free conditions, broad substrate scope, good tolerance of a wide range of functional groups, and high efficiency. In addition, the synthetic potential of this method as a tool for
oxidative cross-coupling of α-amino ketones with a wide range of alcohols is described. Using a combination of air and dimethyl sulfoxide (DMSO) as oxidants, the protocol allows an efficient synthesis of α-carbonyl N,O-acetals with high functional group tolerance and enables the late-stage introduction of α-amino ketones into biorelevant alcohols. Moreover, the present method can be used in the coupling of
Combinatorial discovery of novel fluorescent dyes based on Dapoxyl™
作者:Qing Zhu、Hai-Shin Yoon、Puja B. Parikh、Young-Tae Chang、Shao Q. Yao
DOI:10.1016/s0040-4039(02)00999-1
日期:2002.7
We have developed a combinatorial method for the fast and effective synthesis of a library based on a known fluorescent dye, Dapoxyl(TM) using parallel solution-phase chemistry. By screening the 140 new compounds using fluorescence-based assays, we identified three new fluorescent dyes with novel properties. (C) 2002 Elsevier Science Ltd. All rights reserved.
Liquid Scintillators. VIII. The Effect of the Dialkylamino Group<sup>1</sup>
作者:V. N. KERR、F. N. HAYES、D. G. OTT、R. LIER、E. HANSBURY