Selective preparation. 30. A convenient preparation of 5,13-di-tert-butyl-8,16-disubstituted-[2.2]metacyclophanes and their trans-tert-butylation and halogenation reactions
A NOVEL REACTION OF 8,16-BIS(BROMOMETHYL) [2.2]METACYCLOPHANES WITH PHENYL LITHIUM AND PREPARATION OF 8,16-UNSYMMETRICALLY DISUBSTITUTED [2.2]METACYCLOPHANES
作者:Masashi Tashiro、Takehiko Yamato
DOI:10.1246/cl.1982.61
日期:1982.1.5
The reaction of 8,16-bis(bromomethyl) [2.2]metacyclophanes (2) with phenyl lithium in ethyl ether afforded the unexpected spiro compounds 3. It was also found that 8,16-unsymmetrically disubstituted [2.2]metacyclophanes 9 such as 8-methyl-16-halomethyl- and 8-methyl-16-methoxy derivatives were easily prepared from 3.