4,5-Dehydro- and 4,5,15,16-Bis(dehydro)octafluoro[2.2]paracyclophanes: Facile Generation and Extraordinary Diels−Alder Reactivity
作者:Merle A. Battiste、Jian-Xin Duan、Yi-An Zhai、Ion Ghiviriga、Khalil A. Abboud、William R. Dolbier
DOI:10.1021/jo0268815
日期:2003.4.1
Dehydroiodination of 4-iodo- and 4,15-diiodo-1,1,2,2,9,9,10,10-octafluoro[2.2]paracyclophane by treatment with (KOBu)-Bu-t in the presence of benzene, naphthalene, anthracene, and [2.2]paracyclophane affords each of the corresponding Diels-Alder mono- and bis-cycloadducts derived from the presumed aryne intermediates in high yield. Monoadducts of t-butylbenzene and furan are also obtained in excellent yield. All of the products were characterized by their NMR spectra, with four of them also being confirmed by X-ray crystallography. The extraordinary selectivity/reactivity of the aryne intermediate is discussed.