Sc(OTf)<sub>3</sub>-Catalyzed Bicyclization of<i>o</i>-Alkynylanilines with Aldehydes: Ring-Fused 1,2-Dihydroquinolines
作者:Can Zhu、Shengming Ma
DOI:10.1002/anie.201406959
日期:2014.12.1
A Sc(OTf)3‐catalyzed cascade Prins‐type cyclization reaction of o‐alkynylanilines, bearing a hydroxy or amine functionality, with aldehydes affords 1,2‐dihydroquinoline derivatives having an extra fused ring efficiently under mild reaction conditions. It is interesting to observe the reversed reactivity in the highly selective formation of 1,2‐dihydroquinoline derivatives instead of the formation of
Tandem cyclization of <i>o</i>-alkynylanilines with isocyanides triggered by intramolecular nucleopalladation: access to heterocyclic fused 2-aminoquinolines
Herein, a novel strategy for the synthesis of various heterocyclic fused 2-aminoquinolines via palladium-catalyzed tandem cyclization of o-alkynylanilines with isocyanides has been developed. This process includes trans-oxy/aminopalladation, isocyanideinsertion, elimination and 1,3-hydrogen migration. Besides high atom and step economy, this method shows good functional group compatibility with excellent
Gold-Catalyzed Domino Cycloisomerization/Pictet–Spengler Reaction of 2-(4-Aminobut-1-yn-1-yl)anilines with Aldehydes: Synthesis of Tetrahydropyrido[4,3-<i>b</i>]indole Scaffolds
作者:B. V. Subba Reddy、Manisha Swain、S.Madhusudana Reddy、J. S. Yadav、B. Sridhar
DOI:10.1021/jo302068e
日期:2012.12.21
A dominocycloisomerization/Pictet–Spengler reaction of 2-(4-aminobut-1-yn-1-yl)aniline with aldehydes has been achieved using a AuIPrCl (5 mol %)/AgSbF6 (10 mol %) catalytic system to produce the corresponding 1-aryl-N-tosyl-2,3,4,5-tetrahydropyrido[4,3-b] indole derivatives in good yields. This is the first report on the synthesis of tetrahydro pyrido[4,3-b]indole scaffolds through as tandem 5-endo-dig
使用AuIPrCl(5 mol%)/ AgSbF 6(10 mol%)催化体系可实现2-(4-氨基丁-1-yn-1-基)苯胺与醛的多米诺环异构化/ Pictet-Spengler反应相应的1-芳基-N-甲苯磺酰基-2,3,4,5-四氢吡啶并[4,3- b ]吲哚衍生物的收率很高。这是有关串联5-内挖-环化和Pictect-Spengler反应合成四氢吡啶并[4,3- b ]吲哚支架的第一份报告。
Cyclic <i>Anti</i>-Azacarboxylation of 2-Alkynylanilines with Carbon Dioxide
作者:Bukeyan Miao、Suhua Li、Gen Li、Shengming Ma
DOI:10.1021/acs.orglett.6b00884
日期:2016.6.3
compounds for the synthesis of many biologically active compounds, efficiently under 1 atm of CO2. The readily available nature of the different starting materials and tolerance of variousfunctionalgroups provide vast opportunities for the efficient construction of diversified libraries for bioactive compounds listed in Figure 1. As an example, this methodology has been applied to the synthesis of Lotronex