Efficient Synthesis of a Variety of New Functionalized Oxacalixarenes by Ullmann Coupling Reactions

Autor:	Liwei Yan, Lijuan Chen, Jihong Li, Kuoyan Ma, Jinsong You, Li Yang, Fei Yang
Rok vydání:	2006
Předmět:	chemistry.chemical_classification Denticity Chemistry Aryl Organic Chemistry Difluoride Substrate (chemistry) Coupling reaction chemistry.chemical_compound Yield (chemistry) Surface modification Organic chemistry Physical and Theoretical Chemistry Crown ether
Zdroj:	European Journal of Organic Chemistry. 2006:1109-1112
ISSN:	1099-0690 1434-193X
Popis:	We have developed an efficient method to synthesize a new type of oxacalix[4]arenes containing nitrogen functional groups in a single step, through N,N-dimethylglycine-promoted Ullmann coupling reactions starting from aryl dibromides in yields of up to 37 %. With a aryl difluoride as substrate, a large, fully aromatic crown ether 8 could be obtained in 25 % yield. Further functionalization of the nitrogen functional groups in the cores of these oxacalixarenes may offer new opportunities for constructing desirable molecular architectures and a range of nitrogen-based multidentate ligands. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)
Databáze:	OpenAIRE
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