Synthesis of substituted tetrahydrofuranones and tetrahydropyranones: Photocycloaddition/fragmentation reactions of dioxinones
作者:Jay H. Dritz、Erick M. Carreira
DOI:10.1016/s0040-4039(97)01262-8
日期:1997.8
The combination of dioxinone aldol addition methodology and [2+2]-photocycloaddition/fragmentation reactions can provide access to substituted tetrahydrofuran-3-ones and tetrahydropyran-4-ones, subunits abundantly found in biologically active natural products. Intramolecular photocyclization of vinyl and allyl ethers with dioxinones, followed by fragmentation in alkaline MeOH (K2CO3) leads to tetrahydrofuran-3-ones
二恶英酮羟醛加成方法和[2 + 2]-光环加成/片段化反应的结合可以提供取代的四氢呋喃-3-酮和四氢吡喃-4-酮,它们是在生物活性天然产物中大量存在的亚基。乙烯基和烯丙基醚与二恶英酮的分子内光环化,然后在碱性MeOH(K 2 CO 3)中裂解,可生成四氢呋喃-3-酮和四氢吡喃-4-酮,从而为复杂分子合成的通用组成部分提供了一条实用途径。