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Synthesis oftrans-1,2-diphenyl-3,4-bis[4-(2,6-diphenyl-4H- pyranylidenyl)]cyclobutane: correction and structure proof

Authors
Journal
Tetrahedron Letters
0040-4039
Publisher
Elsevier
Publication Date
Volume
23
Issue
17
Identifiers
DOI: 10.1016/s0040-4039(00)86730-1

Abstract

Abstract The reaction of phenyl lithium acetylide ( 2 ) with 2,6-diphenylpyrylium perchlorate ( 1 ) is solvent dependent. With diethyl ether as solvent, the isolated product differed from that previously reported and is reassingned as 2,6-diphenyl-4-phenylacetylenyl-4 H -pyran ( 5 ). On the other hand, in THF the title compound ( 6 ) was obtained; its structure confirmed by single-crystal x-ray crystallography.

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