Pyrimidyl-penta-phenylbenzenes have been synthesized by Diels-Alder addition of phenyl-ethynylpyrimidines and tetraphenylcyclopentadienones under microwave irradiation. Scholl reactions of these Compounds led to two types of hetero polyaromatic hydrocarbons: (a) partial cyclization by creation of two C-C bonds ortho to the pyrimidine nitrogen atoms gave substituted tribenzo[e,ghj]perimidine (N-1/3HSB) in high yields; (b) when the position 2 of the pyrimidine ring was substituted by a tert-butyl group, the Scholl reaction was complete and provided the first example of a diaza-hexa-peribenzocoronene. (C) 2009 Elsevier Ltd. All rights reserved.
One-Pot, High-Yielding, Oxidative Cyclodehydrogenation Route for N-Doped Nanographene Synthesis
作者:Colm Delaney、Gearóid M. Ó Máille、Brendan Twamley、Sylvia M. Draper
DOI:10.1021/acs.orglett.5b03312
日期:2016.1.4
An intramolecular oxidative cyclodehydrogenation via a one-pot process is described, which induces selective C-C bond formation and bromine functionalization. The application of this new route gives rise to a novel family of partially fused, selectively brominated N-doped pyrimidine graphenes.