Synthesis of 4,5-fused tricyclic quinolines via an acid-promoted intramolecular Friedel–Crafts allenylation of aniline derivatives
摘要:
A novel method for synthesizing 4,5-fused tricyclic quinoline derivatives based on an acid-promoted intramolecular Friedel-Crafts allenylation of anilines. Using aryl group-substituted propargyl alcohol derivatives with a meta-substituted N-Boc aniline unit as substrates, a four-step reaction sequence involving an acid-promoted intramolecular Friedel-Crafts allenylation of anilines, an acid-promoted intramolecular C-N bond formation, deprotection of the Boc group, and air oxidation proceeded in a single pot, producing the corresponding 4,5-fused tricyclic quinoline derivatives in 31-84% yield. (C) 2014 Elsevier Ltd. All rights reserved.
A versatile method for the preparation of allenic alcohols
作者:Gary E. Keck、R.R. Webb
DOI:10.1016/s0040-4039(00)87530-9
日期:1982.1
A convenient three step procedure to a variety of allenicalcohols is described, which relies on a highly unusual partitioning between two reaction pathways depending on the mode of addition of a reagent.
Gold-Catalyzed Synthesis of Bicyclo[3.2.0]heptenes via a Formal [3+2]/[2+2]-Annulation of Allylsilane with 4-Methoxybut-2-yn-1-ols
作者:Chun-Yao Yang、Chiou-Dong Wang、Shu-Fan Tian、Rai-Shung Liu
DOI:10.1002/adsc.201000201
日期:——
This work reports the novel gold‐catalyzed [3+2]/[2+2]‐annulation of allylsilane with 4‐methoxybut‐2‐yn‐1‐ols that yields highly strained bicyclo[3.2.0]heptene products efficiently and stereoselectively.