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New Reactions of a Dibenzo[a,e]pentalene

✍ Scribed by Masaichi Saito; Michio Nakamura; Tomoyuki Tajima

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
540 KB
Volume
14
Category
Article
ISSN
0947-6539

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✦ Synopsis

Abstract

Reduction of dibenzo[a,e]pentalene 3 (denoted as dibenzopentalene hereafter) with excess lithium gave dilithium dibenzopentalenide 1. Since oxidation of 1 with iodine gave 3, redox behavior between 1 and 3 is controllable and reversible. Reaction of 3 with methyllithium gave lithium 5‐methyldibenzopentalenide 5, the formation of which was evidenced by some trapping experiments and X‐ray crystallographic analysis. Reactions of 3 with halogens gave 5,10‐dihalodibenzopentalenes, 8 and 9. Some optical properties of novel dibenzopentalene derivatives are also demonstrated.

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