| Literature DB >> 24123264 |
Yong Guan1, Zhensheng Ding, William D Wulff.
Abstract
The active site in the BOROX catalyst is a chiral polyborate anion (boroxinate) that is assembled in situ from three equivalents of B(OPh)3 and one of the VANOL ligand by a molecule of substrate. The substrates are bound to the boroxinate by H bonds to oxygen atoms O1-O3. The effects of introducing substituents at each position of the naphthalene core of the VANOL ligand are systematically investigated in an aziridination reaction. Substituents in the 4,4'- and 8,8'-positions have a negative effect on catalyst performance, whereas, substituents in the 7- and 7'-positions have the biggest impact in a positive direction.Entities:
Keywords: asymmetric catalysis; biaryls; catalysis; structure-activity relationships
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Year: 2013 PMID: 24123264 PMCID: PMC3947456 DOI: 10.1002/chem.201302451
Source DB: PubMed Journal: Chemistry ISSN: 0947-6539 Impact factor: 5.236