Silver Acetate Catalyzed Hydroamination of 1-(2-(Sulfonylamino)phenyl)prop-2-yn-1-ols to (Z)-2-Methylene-1-sulfonylindolin-3-ols
摘要:
A method to prepare (Z)-2-methylene-1-sulfonylindolin-3-ols efficiently that relies on silver acetate catalyzed hydroamination of 1-(2-(sulfonylamino)phenyl)prop-2-yn-1-ols is reported. The reactions proceed rapidly at room temperature with catalyst loadings as low as 1 mol % under conditions that did not require the exclusion of air or moisture. The utility of this N-heterocyclic ring-forming strategy as a synthetic tool that makes use of unsaturated alcohols was exemplified by the conversion of the (Z)-2-methylene-1-sulfonylindolin-3-ol to examples of other members of the indole family of compounds.
One-Pot Trimetallic Relay Catalysis: A Unified Approach for the Synthesis of β-Carbolines and Other [<i>c</i>]-Fused Pyridines
作者:Seema Dhiman、Uttam K. Mishra、S. S. V. Ramasastry
DOI:10.1002/anie.201600840
日期:2016.6.27
for the synthesis of 1,3‐di‐ and 1,3,4‐trisubstituted β‐carbolines through an unprecedented one‐pot triple‐orthogonal‐metal relay catalysis, and 1,3‐disubstituted 4‐hydroxy‐β‐carbolines through a one‐pot bimetallic relay catalysis from readily accessible 3‐(2‐aminophenyl)‐5‐hexenyn‐3‐ols. These strategies were elaborated to enable the synthesis of benzofuro[2,3‐c]pyridines, benzothieno[2,3‐c]pyridines
提出了一种通过空前的一锅三正交金属中继催化合成1,3-二取代和1,3,4-三取代的β-咔啉和1,3-二取代的4-羟基通过容易获得的3-(2-氨基苯基)-5-hexenyn-3-ols通过一锅双金属中继催化作用生成β-咔啉。精心设计了这些策略,可以合成苯并呋喃[2,3- c ]吡啶,苯并噻吩并[2,3- c ]吡啶和异喹啉,否则需要多步合成。
Relay Cu(I)/Brønsted Base Catalysis for
<i>Phospha</i>
‐Michael Addition/5‐
<i>exo</i>
‐
<i>dig</i>
Cyclization/Isomerization of
<i>in</i>
<i>situ</i>
Formed
<i>aza</i>
‐Alkynyl
<i>o‐</i>
quinone methides with P(O)−H compounds to C3‐Phosphorylated Indoles
作者:Long Chen、Xiao‐Yan Liu、Jing Zhang、Li Duan、Zhong Wen、Hai‐Liang Ni
DOI:10.1002/adsc.202100275
日期:2021.6.21
1-(o-aminophenyl)prop-2-ynols with P(O)-compounds has been established to afford C3-phosphorylated indoles. It demonstrates that the 1,4-conjugate addition adduct from N-o-AQMs could undergo further cyclization with the tethered alkyne moiety to afford N-heterocyclic compounds.