Controllable Synthesis of Polyheterocyclic Spirooxindoles and 3,3‐Bistryptophol Oxindoles via Fe(ClO
<sub>4</sub>
)
<sub>3</sub>
⋅ 6H
<sub>2</sub>
O‐Promoted Hetero‐Pictet‐Spengler Reaction
作者:Jun‐Rong Song、Zhi‐Yao Li、Guang‐Di Wang、Ni Zhang、Chao Chen、Juan Chen、Hai Ren、Weidong Pan
DOI:10.1002/adsc.201901346
日期:2020.2.6
hetero‐Pictet‐Spengler reaction has been developed, enabling divergent approaches to plenty of structurally diverse polyheterocyclic spirooxindoles and 3,3‐bistryptophol oxindoles from readily available isatins and substituted aromatic heterocyclic derivatives in up to 98% yield. Mechanistic investigation reveals that the perchloric acid generated upon on hydrolysis of Fe(ClO4)3 ⋅ 6H2O by residual water was the real
一种高效的Fe(CLO 4)3 ⋅6H 2 O形促进杂的Pictet-Spengler反应已经开发,使发散接近大量结构不同的多杂环spirooxindoles和从容易获得的靛红-3,3- bistryptophol羟吲哚和取代的芳族杂环衍生物的收率高达98%。机理调查表明,对Fe(CLO的水解时所产生的高氯酸4)3 ⋅6H 2由残余水O的实际催化剂。这种转化的合成鲁棒性通过对催化剂的友好,易于处理以及对各种特权杂环骨架的可控制访问来证明。