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Configuration of the cyclobutane photodimers of 2-ethoxy- and 2-methoxy-1,4-naphthoquinone

✍ Scribed by F.J.C. Martins; A.M. Viljoen; P.L. Wessels

Publisher: Elsevier Science
Year: 1987
Tongue: French
Weight: 634 KB
Volume: 43
Category: Article
ISSN: 0040-4020
DOI: 10.1016/s0040-4020(01)89948-8

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✦ Synopsis

The structure and configuration of the C4-dimers of 2-ethoxy-2-methoxy-1,4-naphtho uinone and related compounds are elucidated from an extensive 1H and 7 3C n.m.r. study.

The importance of the sign of the proton-proton and 13C-1H coupling constants in determining the structures of these type of compounds is discussed.

The assignment of signals was accomplished by selective population inversion (SPI) experi= ments.

The use of reductive cleavage reactions to support structure deductions is also demonstrated.

This approach to structural analysis should facilitate the characterisation of other cyclobutane compounds.

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