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US5220048A Substituted benzocyclobutenes, a process for their preparation and their use 失效
取代的苯甲酸酯,其制备方法及其使用

Substituted benzocyclobutenes, a process for their preparation and their
use
摘要:
Benzocyclobutene-1,2-dichlorides, -bromides and -iodides which are substituted in the benzene ring are accessible in good yields and short reaction times by reacting substituted 1,2-(dichloromethyl or dibromomethyl)-benzenes with NaI in acetonitrile as the solvent. They can be used together with dienophils, for example 1,4-quinones, in Diels-Alder reactions.
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