α-Diazo β-Keto Ester as Precursor to Aromatic CH Insertion and Wolff Rearrangement with Different Directing Groups
作者:Biao Ma、Fang-Lei Chen、Xing-Yu Xu、Yi-Nan Zhang、Li-Hong Hu
DOI:10.1002/adsc.201300763
日期:2014.2.10
AbstractA tunable aromatic CH insertion and a Wolff rearrangement of α‐diazo β‐keto esters precursor were developed. Different directing groups on nitrogen led with high selectivity to either dihydroquinoline or 2‐carbamoylacrylate motifs, which can be transformed to multiple heterocyclic scaffolds.magnified image
NH<sub>4</sub>PF<sub>6</sub>-promoted cyclodehydration of α-amino carbonyl compounds: efficient synthesis of pyrrolo[3,2,1-ij]quinoline and indole derivatives
NH4PF6 is an inexpensive, safe, and low-toxicity inorganic salt; it was found to promote the cyclodehydration of α-amino carbonyl compounds in the absence of metal reagents. This simple cyclodehydration strategy enables highly atom-economic formation of pyrrolo[3,2,1-ij]quinoline and indole derivatives, which are significant pharmacophores.
NH 4 PF 6是一种廉价,安全且低毒的无机盐;发现在不存在金属试剂的情况下可促进α-氨基羰基化合物的环脱水。这种简单的环脱水策略使吡咯并[3,2,1- ij ]喹啉和吲哚衍生物具有很高的原子经济性,这是重要的药效团。