Non-covalent Li···H interaction in the synthesis of peri-disubstituted naphthalene proton sponges.

Submitting author affiliation:
St. Petersburg State University, Petergof, St. Petersburg, Russian Federation

Beilstein Arch. 2019, 201914. https://doi.org/10.3762/bxiv.2019.14.v1

Published 23 Apr 2019

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Abstract

Non-covalent Li···H interaction was utilized as a tool for the second lithiation of 4-lithio-1,8-bis(dimethylamino)naphthalene with n-BuLi in the presence of TMEDA in hexane. Metallation proceeds with 100% selectivity in the second peri-position and with up to 90% yield. A series of 4,5-disubstituted derivatives of DMAN has been prepared in a good to excellent yield after quenching the reaction mass with different electrophiles.

Keywords: Agostic interaction; metallation; proton sponge; lithium

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Antonov, A. S. Beilstein Arch. 2019, 201914. doi:10.3762/bxiv.2019.14.v1

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