A novel method for the synthesis of epoxydibenzo[b,f][1,5]diazocines exhibiting a V-shaped molecular architecture is reported. The unique approach is based on unprecedented base-catalyzed, solvent-free autocondensation and cross-condensation of fluorinated o-aminophenones. The structure of the newly synthesized diazocines was confirmed independently by X-ray analysis and chiroptical methods. The rigidity
报道了一种合成具有 V 形分子结构的环氧二苯并 [ b , f ] [1,5]重氮辛的新方法。这种独特的方法基于前所未有的碱催化、无溶剂自缩合和氟化邻苯二甲酸的交叉缩合-氨基苯酮。通过 X 射线分析和手性光学方法独立地证实了新合成的重氮辛的结构。重氮辛支架的刚性允许将外消旋体分离成单个对映异构体,这些对映异构体在高达 140 °C 时具有热稳定性。此外,通过进行一系列典型的转化,包括过渡金属催化的反应,在不影响双半胺亚基的情况下进行,证明了重氮辛支架的惰性。
NHC–BIAN–Cu(I)-Catalyzed Friedländer-Type Annulation of 2-Amino-3-(per)fluoroacetylpyridines with Alkynes on Water
The direct catalytic alkynylation/dehydrative cyclization of 2-amino-3-trifluoroacetyl-pyridines on water was developed for the efficient synthesis of a broad range of fluorinated 1,8-naphthyridines from terminal alkynes. A novel N-heterocycliccarbene (NHC) ligand system that combines a π-extended acenaphthylene backbone with sterically bulky pentiptycene pendant groups was successfully utilized in
Switchable Selectivity in the Annulation of <i>o</i>‐Trifluoroacetylanilines and Activated Terminal Alkynes Based on Transition Metal and Phosphine Catalysis
作者:Alexander Yu. Mitrofanov、Arina V. Murashkina、Konstantin A. Lyssenko、Irina P. Beletskaya
DOI:10.1002/chem.202302357
日期:2023.11.16
Based on Cu ang Ag catalysis as well as phosphine catalysis, we have developed efficient methods for the synthesis of three different types of CF3-substituted compounds (quinoline-3-carboxylates, quinoline-2-carboxylates, and indolines) from the same starting materials such as o-trifluoroacetylanilines and propiolates.