已经开发了一种有趣的新途径,可通过串联的Friedel-Crafts烷基化反应和Thia-Michael加成反应获得3,4-二氢硫代吡喃并[3,4- b ]吲哚-1(9 H)-亚胺。此外,所描述的方法学也适用于研究较少的四氢-1 H - thiepino [3,4- b ]吲哚支架。该策略以原子经济,各种官能团耐受性和广泛的底物范围为关键特征。
已经开发了一种有趣的新途径,可通过串联的Friedel-Crafts烷基化反应和Thia-Michael加成反应获得3,4-二氢硫代吡喃并[3,4- b ]吲哚-1(9 H)-亚胺。此外,所描述的方法学也适用于研究较少的四氢-1 H - thiepino [3,4- b ]吲哚支架。该策略以原子经济,各种官能团耐受性和广泛的底物范围为关键特征。
Palladium-Mediated Oxidative Annulation of δ-Indolyl-α,β-Unsaturated Compounds toward the Synthesis of Cyclopenta[<i>b</i>]indoles and Heterogeneous Hydrogenation To Access Fused Indolines
作者:André Capretz Agy、Manoel T. Rodrigues、Lucas A. Zeoly、Deborah A. Simoni、Fernando Coelho
DOI:10.1021/acs.joc.9b00505
日期:2019.5.3
The cyclopenta[b]indole moiety represents a key skeletal unit in several natural and synthetic compounds that exhibit diverse biological properties. We described herein a two-step sequence for synthesizing cyclopenta[b]indoles with great structural diversity in overall yields up to 37%. The key step was a palladium-catalyzed oxidative annulation of 3-alkylindoles (Fujiwara–Moritani reaction). The obtained
环戊[ b ]吲哚部分代表几种天然和合成化合物的关键骨架单元,这些化合物表现出多种生物学特性。我们在本文中描述了用于合成具有巨大结构多样性的环戊并[ b ]吲哚的两步序列,总产率高达37%。关键步骤是钯催化的3-烷基吲哚的氧化环化反应(藤原-莫里塔尼反应)。所获得的环戊[ b ]吲哚被用作非均相氢化反应的底物,从而以中等收率提供了新的熔融二氢吲哚。三个这样的二氢吲哚的酸催化的分子内环化反应以89%,90%和61%的收率得到四环内酰胺。
Preparation and reactions of zinc and copper organometallics bearing acidic hydrogens
作者:H. Peter Knoess、Michael T. Furlong、Michael J. Rozema、Paul Knochel
DOI:10.1021/jo00021a003
日期:1991.10
Organozinc and copper reagents bearing unprotected primary or secondary amines or amides or a terminal acetylenic proton were prepared and reacted with various electrophiles in good yields.