نتایج جستجو برای: 18 and 24 crown ethers

تعداد نتایج: 16918122  

Journal: :Journal of Japan Oil Chemists' Society 1988

Journal: :Journal of Japan Oil Chemists' Society 1988

Journal: :Journal of Japan Oil Chemists' Society 1980

Journal: :Journal of Japan Oil Chemists' Society 1987

Journal: :Organic & biomolecular chemistry 2013
Xiaohui Fan Lin-An Fu Na Li Hao Lv Xiao-Meng Cui Yuan Qi

A new method for the synthesis of diverse N-alkylation compounds was developed via an iron-catalyzed etheric C(sp(3))-O cleavage with the C-N bond formation in the reaction of π-activated ethers with various nitrogen-based nucleophiles. In addition, the mechanism of this reaction was investigated.

Journal: :Chemical communications 2007
Sally Dixon Richard C D Brown Philip A Gale

Preparation of (di)benzocrown-substituted aryl-zinc or -boron reagents and their palladium-catalysed cross-coupling with functionalised aryl halides is described for convenient synthesis of novel crown ether systems.

2004
L. Töke P. Bakó T. Bakó

A number of new chiral crown compounds and lariat ethers have been synthesized starting from phenyl-D-glucopyranoside, methyl-D-glucopyranoside and galactopyranoside, methyl-D-mannopyranoside and 1,2:5,6-di-O-isopropylidene-D-mannitol, but the main emphasis was laid on their application. Some of the sugar-based macrocycles showed significant asymmetric induction as phase transfer catalysts in l...

Journal: :Journal of Japan Oil Chemists' Society 1988

Journal: :Journal of Japan Oil Chemists' Society 1989

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