En Route to Molecular Bracelets: The Synthesis of Linear Pentacyclic Bis(benzodiazocino)benzenes
作者:Ying Cheng、Qing-Xiang Liu、Otto Meth-Cohn *
DOI:10.1055/s-2000-6392
日期:——
The title compounds, namely dibenzo[b,b′]benzo[1,2-f:4,5-f′]bis[1,5]diazocines, have been synthesised in a single step in two alternative ways by application of the `tertiary amino effect': (i) the action of bis-Vilsmeier reagents derived from N,N′-dimethyl-N,N′-diformyl-p-phenylenediamine upon 4-substituted N,N-dimethylanilines, and (ii) the action of Vilsmeier reagents derived from 4-substituted N-methylformanilides on bis(dimethylamino)benzenes.
Herein we report the first catalytic decarbonylation and decarbonylative hydroamination of formamides without using additives enabled by a redox-neutral rare earth catalyst. The protocol displays complete N-aryl/alkenyl formamide-selectivity, thus providing a wide variety of creative uses of the N-formylation and N-deformylation method and opening up new prospects for minimizing waste and controlling