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Indexed by:期刊论文

Date of Publication:2015-02-01

Journal:CHEMICAL SCIENCE

Included Journals:SCIE、EI、PubMed、Scopus、ESI高被引论文

Volume:6

Issue:2

Page Number:1035-1042

ISSN No.:2041-6520

Abstract:The direct formation of new C-C bonds through photocatalytic oxidative coupling from low reactive sp(3) C-H bonds using environmentally benign and cheap oxygen as oxidant is an important area in sustainable chemistry. By incorporating the photoredox catalyst [SiW11O39Ru(H2O)](5-) into the pores of Cu-based metal-organic frameworks, a new approach for merging Cu-catalysis/Ru-photocatalysis within one single MOF was achieved. The direct Cu-II-O-W(Ru) bridges made the two metal catalyses being synergetic, enabling the application on the catalysis of the oxidative coupling C-C bond formation from acetophenones and N-phenyl-tetrahydroisoquinoline with excellent conversion and size-selectivity. The method takes advantage of visible light photoredox catalysis to generate iminium ion intermediate from N-phenyl-tetrahydroisoquinoline under mild conditions and the easy combination with Cu-catalyzed activation of nucleophiles. Control catalytic experiments using similar Cu-based sheets but with the photoredox catalytic anions embedded was also investigated for comparison.