Multivalent, Sulfur??Rich PyBox Asterisk Ligands in Asymmetric Metal Catalysis
C Aubert, C Dallaire, G Pèpe, E Levillain…
Index: Aubert, Catherine; Dallaire, Carol; Pepe, Gerard; Levillain; Felix, Guy; Gingras, Marc European Journal of Organic Chemistry, 2012 , # 31 p. 6145 - 6154
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Abstract
Abstract Multivalent PyBox asterisk ligand 1 and monovalent ligand 2 are reported. The innovative feature in 1 is a sulfur-rich persulfurated benzene core as a template joining six PyBox units in close proximity. An efficient persulfuration of C 6 Cl 6 with p- methoxybenzenethiol (95%,> 99% per C–S bond) and deprotection led to hexaphenol 4. Six O-arylations of 4 with Cl-PyBox 3 (94%,> 99% per C–O bond) provided 1. The electronic ...
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