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Migratory aptitudes of alkyl groups on boron: a computational study of halomethyllithium-induced migration reactions

Elliott, Mark Christopher and Smith, Keith 2013. Migratory aptitudes of alkyl groups on boron: a computational study of halomethyllithium-induced migration reactions. Organometallics 32 (17) , pp. 4878-4881. 10.1021/om4006164

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Abstract

For reactions of alkyldioxaborolanes with halomethyllithium reagents, migrations of tertiary alkyl groups and benzylic groups often give lower yields of migrated products. The only published computational study calculated the barriers to tert-alkyl migration to be lower than for other types of simple alkyl groups. In contrast to this, the present work shows that, when detailed conformational analysis is carried out, tert-alkyl and benzylic groups have significantly higher gas phase barriers to migration than for other types of alkyl groups, such that for tertiary alkyl groups, oxygen migration of the ethylenedioxy group could compete. The barriers are reduced when a solvent model is included, which reduces the importance of oxygen migration.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Subjects: Q Science > QD Chemistry
Publisher: American Chemical Society
ISSN: 0276-7333
Last Modified: 04 Jun 2017 05:18
URI: http://orca.cf.ac.uk/id/eprint/50467

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