One-pot three-component synthesis of 2H-thiopyrano[2,3-b]quinoline-2,3-dicarboxylates from 2-mercaptoquinoline-3-carbaldehydes, dialkyl acetylenedicarboxylates and Ph3P
摘要:
An extremely concise one-pot procedure toward the synthesis of 2H-Thiopyrano [2,3-b]quinoline-2,3-dicarboxylates whose applications as medicines is predictable has been established. This approach produces three fused rings evolving from the formation of four new carbon-carbon bonds and a stereogenic center in a one-pot protocol.[GRAPHICS].
Enantioselective Organocatalytic Domino Michael/Aldol Reactions: An Efficient Procedure for the Stereocontrolled Construction of 2<i>H</i>-Thiopyrano[2,3-b]quinoline Scaffolds
An efficientprocedure for the stereocontrolledconstruction of 2H‐thiopyrano[2,3‐b]quinolinescaffolds has been developed, starting from simple compounds. The dominoMichael/aldolreactions between 2‐mercaptobenzaldehydes and enals, promoted by chiral diphenylprolinol TMS ether, proceed with excellent chemo‐ and enantioselectivity to give the corresponding synthetically useful and pharmaceutically
从简单的化合物开始,已经开发出了一种有效的立体控制2 H -thiopyrano [2,3-b]喹啉骨架的方法。手性二苯基脯氨醇TMS醚促进的2-巯基苯甲醛与烯醛之间的多米诺米歇尔/羟醛反应,具有出色的化学和对映选择性,可提供相应的合成上有用的和药学上有价值的2 H-硫代吡喃并[2,3-b]喹啉ee的产率为90–99%。
Rapid, clean and efficient one-pot synthesis of thiopyrano[2,3-b]quinolines via domino Michael addition/cyclization reactions
作者:Bhawana Singh、Atish Chandra、Mrityunjaya Asthana、Radhey M. Singh
DOI:10.1016/j.tetlet.2012.04.032
日期:2012.6
Rapid and efficient one-pot synthesis of thiopyrano[2,3-b]quinolines is described from the reaction of 3-formyl-quinoline-2-thiones with acrylonitrile using economical organic base Et3N at room temperature. The reaction proceeded smoothly via domino Michaeladdition/cyclization reactions and did not require dry solvent, inert atmosphere and column chromatography purifications.
从3-甲酰基-喹啉-2-硫酮与丙烯腈在室温下使用经济的有机碱Et 3 N反应,可以快速高效地一锅合成噻吩并[2,3- b ]喹啉。该反应通过多米诺骨牌迈克尔加成/环化反应顺利进行,不需要干燥溶剂,惰性气氛和柱色谱法纯化。
Synthesis of Optically Active 2<i>H</i>-Thiopyrano[2,3-<i>b</i>]quinolines with Three Contiguous Stereocenters<i>via</i>an Organocatalytic Asymmetric Tandem Michael-Henry Reaction
Optically active 2H‐thiopyrano[2,3‐b]quinolines with threecontiguousstereocenters have been synthesized via a chiral bifunctional squaramide‐catalyzed tandem Michael–Henry reaction between 2‐mercaptoquinoline‐3‐carbaldehydes and nitroolefins. The reactions proceed with excellent diastereo‐ and enantioselectivity to give the title compounds in high yields with high levels of diastereo‐ and enantioselectivity
光学活性的2 H-硫代吡喃并[2,3- b ]喹啉具有三个连续的立体中心,是通过2-巯基喹啉-3-甲醛与硝基烯烃之间的手性双官能方酰胺催化的迈克尔-亨利串联反应合成的。反应以极好的非对映和对映选择性进行,以高收率得到标题化合物,同时具有高水平的非对映和对映选择性(分别高达> 99/1 dr和> 99%ee)。
An efficient domino reaction in ionic liquid: Synthesis and biological evaluation of some pyrano- and thiopyrano-fused heterocycles
作者:Narsidas J. Parmar、Rikin A. Patel、Bhagyashri D. Parmar、Navin P. Talpada
DOI:10.1016/j.bmcl.2013.01.079
日期:2013.3
An improved domino/Knoevenagel-hetero-Diels–Alder reaction of two new aldehyde substrates; 7-olefinoxy-coumarin-8-carbaldehyde and 2-alkensulfanyl-quinoline-3-carbaldehyde, with pyrazolones was studied in ionic liquid triethylammonium acetate (TEAA), affording a series of pyrazolopyran annulated-pyrano-fused coumarins, and thiopyrano-fused quinolones. Besides acting as catalyst, since no additional
The synthesis of iminothiophenone-fused quinolines and evaluation of their serendipitous reactions
作者:Morteza Shiri、Zeinab Faghihi、Hossein A. Oskouei、Majid M. Heravi、Shima Fazelzadeh、Behrouz Notash
DOI:10.1039/c6ra11469e
日期:——
The novel synthesis of tricyclic 2-(cyclohexylimino)thieno[2,3-b]quinolin-3(2H)-ones from the reaction of 2-mercaptoquinoline-3-carbaldehydes and isocyanides in methanol without the use of any additive is described. This protocol proceeds with high atom economy through the formation of C–S and C–C bonds and then oxidation via tandem reaction. Moreover, some other remarkable aspects of this reaction
描述了在不使用任何添加剂的情况下,由2-巯基喹啉-3-甲醛与异氰酸酯在甲醇中反应合成三环2-(环己基氨基)噻吩并[2,3 - b ]喹啉-3(2H)-的新方法。 。该协议通过形成C–S和C–C键,然后通过串联反应进行氧化来实现高原子经济性。此外,还研究了该反应的其他显着方面,例如水解和与芳族胺的三组分反应以产生高度共轭的席夫碱。