Singlet oxygen addition to chiral allylic alcohols and subsequent peroxyacetalization with β-naphthaldehyde: synthesis of diastereomerically pure 3-β-naphthyl-substituted 1,2,4-trioxanes
作者:Axel G. Griesbeck、Tamer T. El-Idreesy、Johann Lex
DOI:10.1016/j.tet.2006.05.093
日期:2006.11
The synthesis of a series of eight β-naphthyl-substituted 1,2,4-trioxanes 3a–h by a sequence of singlet oxygen ene reaction of allylic alcohols 1a–h and Lewis acid catalyzed peroxyacetalization of the allylic hydroperoxides 2a–h with β-naphthaldehyde is reported. The ene reactions were performed by solid-state photooxygenation in dye-crosslinked polystyrene beads and resulted in mixtures of diastereoisomeric
一系列八个β萘基取代的1,2,4-三恶烷的合成图3a - ħ通过烯丙基醇的单重态氧烯反应的序列1A - ħ和烯丙基氢过氧化物的路易斯酸催化peroxyacetalization 2A - ħ与β报道了萘醛。烯类反应是通过在染料交联的聚苯乙烯珠粒中进行固态光氧合而进行的,并生成非对映异构氢过氧化物2的混合物。三氟化硼催化peroxyacetalization导致形成3,以及1,2,4-三氧杂环己烷4和5通过酸催化的β-氢过氧醇裂解形成。