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Chemistry of Benzocyclopropenes. 1H-and 13C-NMR. Spectra of 2, 5-dideuterio-1-fluorobenzocyclopropenium ion

✍ Scribed by Paul Müller; Jean Pfyffer; Edeline Wentrup-Byrne; Ulrich Burger

Book ID
102250965
Publisher
John Wiley and Sons
Year
1978
Tongue
German
Weight
358 KB
Volume
61
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

Preparation of 1, 1‐difluorobenzocyclopropene (4) and of its 2, 5‐ and 3, 4‐dideuterio derivatives 4a and 4b is reported. Upon ionization in cold fluorosulfonic acid, 4 affords 1‐fluorobenzocyclopropenium ion (6). ^1^H‐ and ^13^C‐NMR. spectra of 4 and 6 are assigned on the basis of the data for the specifically deuteriumlabelled compounds 4a and 6a. Hydrolysis of 6a leads to 2, 5‐dideuteriobenzoic acid (7a).

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