Iterative Benzyne−Furan Cycloaddition Reactions: Studies toward the Total Synthesis of <i>e</i><i>nt-</i>Sch 47554 and <i>e</i><i>nt-</i>Sch 47555
作者:Gillian E. Morton、Anthony G. M. Barrett
DOI:10.1021/ol061007+
日期:2006.6.1
8-dimethoxy-1-naphthol, prepared from the lithiation and benzyne formation from 1,4-difluoro-2,5-dimethoxybenzene and Diels-Aldercycloaddition with furan, was sequentially C-glycosidated under Suzuki conditions and O-glycosidated using di-O-acetyl-L-rhamnal to provide the corresponding beta-naphthyl C,O-disaccharide. Further lithiation, benzyne formation, and cycloaddition with furan gave an oxa-bridged 1,
1,4-Difluoro-2,5-dimethoxybenzene as a Precursor for Iterative Double Benzyne−Furan Diels−Alder Reactions
作者:Gillian E. Morton、Anthony G. M. Barrett
DOI:10.1021/jo050112e
日期:2005.4.1
oxabenzonorbornadienes were synthesized following the initial Diels−Alder reaction, which upon ringopening under acidic conditions gave substituted naphthol derivatives. Highly substituted anthracenols were generated in the second benzyne−furan Diels−Alder reaction following acid-catalyzedisomerization of the cycloadducts.