Beilstein J. Org. Chem.2018,14, 1120–1180, doi:10.3762/bjoc.14.98
; dibenzotropone; halobenzotropolone; halobenzotropone; tribenzotropone; tropone; Review
1. Introduction
Tropone (1) and tropolone (2) have fascinated organic chemists for well over one hundred years. The carbocycles 1 and 2 are a special variety of organic compounds and represent a nonbenzenoid type of aromatic
corresponding halobenzotropone (Scheme 52). In 1969, two research groups independently reported the preparation of 2-bromo-4,5-benzotropone via adduct 308 starting from 2-methoxynaphthalene (306) using different dibromocarbene reagents (Scheme 52) [180][181]. The results for the synthesis of halo-benzotropones
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Graphical Abstract
Scheme 1:
Tropone (1), tropolone (2) and their resonance structures.