Synthesis and structure of longitudinally twisted polycyclic aromatic hydrocarbons
作者:Robert A. Pascal、William D. McMillan、Donna Van Engen、Robert Gregory Eason
DOI:10.1021/ja00249a032
日期:1987.7
The syntheses of 9,18-diphenyl, 9,18-bis(4-chlorophenyl)-, 9,18-bis(4-(trifluoromethyl)phenyl)-, and 9,18-bis(4-isopropylphenyl)tetrabenz(a,c,hj)anthracene as well as 9,18-diphenyltetrabenz(de,jk,op,uv)pentacene are described. X-ray crystallographic analyses of the first three compounds show them to be highly distorted from planarity, with the end-to-end twists of the anthracene moieties ranging from
Suzuki–Miyaura cross-coupling of diphenylacetylenederivatives. While the conversion of 1 into [12]BC is still under investigation, an unexpected rearrangement of the triene moieties in 1, affording a tribenzo[f,k,m]tetraphene structure, was discovered during the screening of reaction conditions. An attempt was made to rationalize this result by proposing a plausible reaction mechanism that proceeds via intermediates