effective direct hydrogen‐atom transfer catalyst for C−H activation. Using the alkylation of C−Hbonds with electron‐deficient alkenes as a model study revealed an extremely broad substrate scope, enabling easy access to a variety of important synthons. This eosin Y‐based photocatalytic hydrogen‐atom transfer strategy is promising for diverse functionalization of a wide range of native C−Hbonds in a green
products. Its light-absorption properties make it useful for the design of functional molecules. However, versatile synthesis methods have not yet been reported. In this report, we present a versatile synthetic method for pseudoindoxyls using the direct S0 → Tn transition under visiblelight irradiation. We also discuss the application of pseudoindoxyls as photocatalysts.
假吲哚酚是在各种天然产物中发现的部分骨架。其光吸收特性使其可用于功能分子的设计。然而,通用的合成方法尚未见报道。在本报告中,我们提出了一种在可见光照射下利用直接 S 0 → T n跃迁合成假吲哚酚的通用方法。我们还讨论了假吲哚酚作为光催化剂的应用。
δ-Nitroalkanols as precursors for the one-pot synthesis of substituted tetrahydrofurans
作者:Roberto Ballini、Dennis Fiorini、Maria Victoria Gil、Alessandro Palmieri、Emilio Román、José Antonio Serrano
DOI:10.1016/s0040-4039(03)00461-1
日期:2003.3
DBU catalyses the one-pot Michael addition of nitroalkanes to 1,4-dienone derivatives, elimination of nitrous acid, then intramolecular conjugate addition-ring closure to allow the direct formation of a variety of tetrahydrofurans. (C) 2003 Elsevier Science Ltd. All rights reserved.