Synthesis of a new triprotonated ligand
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N. CheraΓ―ti; M.E. Brik
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Article
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1999
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Elsevier Science
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French
β 212 KB
Selective O-demethylation of the ortho methyl catecholate of N,N',N"-tris-(2,3dimethoxybenzeyl)-l,l,l-tris-(L-methioninemehyl)-ethane (2) has been accomplished by boron tribromide. The intramolecular nucleophilic attack of divalent sulphur on methyl enhance this cleavage, favours this selctivity and