Synthesis 2006(20): 3478-3484  
DOI: 10.1055/s-2006-950239
PAPER
© Georg Thieme Verlag Stuttgart · New York

Synthesis, Cross-Coupling, and Anionic Cyclization of ortho-Substituted Naphthaleneboronic Esters

Morten Lysén, Maurice Madden, Jesper Langgaard Kristensen, Per Vedsø, Camilla Zøllner, Mikael Begtrup*
Department of Medicinal Chemistry, The Danish University of Pharmaceutical Sciences, Universitetsparken 2, 2100 Copenhagen, Denmark
Fax: +4535306040; e-Mail: mb@dfuni.dk;
Further Information

Publication History

Received 3 February 2006
Publication Date:
10 October 2006 (online)

Abstract

1-Fluoro-, 1-chloro- and 1-cyanonaphthalene were lithiated and then borylated at the 2-position. The 1-substituted naphthaleneboronic esters were cross-coupled with aryl halides to give 2-aryl-1-fluoro-, 2-aryl-1-chloro- and 2-aryl-1-cyanonaphthalenes. The 2-aryl-1-cyano- and 2-aryl-1-fluoronaphthalenes were reacted with n-butyllithium or lithium morpholide to give new benzophen­anthridine derivatives.

31

Neopentylglycol = 2,2-dimethylpropane-1,3-diol.