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Thermal cycloaddition of 4-phenyl-1,2,4-triazoline-3,5-dione to 7,7-carbomethoxy-7H-benzocycloheptene and 7,7-dimethyl-7H-benzocycloheptene cycloheptatriene-norcaradiene equilibrium

✍ Scribed by Basri Atasoy; Metin Balci; Orhan Büyükgüngör

Book ID: 108382858
Publisher: Elsevier Science
Year: 1987
Tongue: French
Weight: 232 KB
Volume: 28
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(00)95780-0

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## Abstract An (__E__)/(__Z)__ mixture (3 : 2) of 7‐benzylidenecycloocta‐1,3,5‐triene (**5**) is obtained when 1‐benzylcycloocta‐1,3,5,7‐tetraene (**7**), prepared by an improved procedure, is treated with __t__‐BuOK in THF. Alternatively, a __ca.__ 9 : 1 mixture (__E__)/(__Z__)‐**5** can be prepar