Rhodium-catalyzed tunable oxidative cyclization toward the selective synthesis of α-pyrones and furans

2016 ◽  
Vol 52 (8) ◽  
pp. 1661-1664 ◽  
Author(s):  
Jiaping Wu ◽  
Dongxu Wang ◽  
Yanjun Wan ◽  
Cheng Ma
Keyword(s):  
Oxidative Cyclization ◽  
Diazo Compounds ◽  
Selective Synthesis ◽  
Substituted Furans

The RhIII-catalyzed tunable oxidative cyclization of readily availableN-tosylacrylamides and diazo compounds toward the selective synthesis of fully substituted furans and α-pyrones is presented.

A controlled selective synthesis of dihydropyrans through tandem reaction of alkynes with diazo compounds

2017 ◽  
Vol 53 (31) ◽  
pp. 4350-4353 ◽  
Author(s):  
Junxiang Min ◽  
Guangyang Xu ◽  
Jiangtao Sun
Keyword(s):  
Michael Addition ◽  
Diazo Compounds ◽  
Tandem Reaction ◽  
Controlled Synthesis ◽  
Selective Synthesis ◽  
Sequential Reaction

A controlled synthesis of dihydropyrans via sequential reaction of allenoate formation and intramolecular oxo-Michael addition has been achieved.

Iodine-Mediated Oxidative Cyclization of 2-(Pyridin-2-yl)acetate Derivatives with Alkynes: Condition-Controlled Selective Synthesis of Multisubstituted Indolizines

Synthesis ◽  
2019 ◽  
Vol 52 (03) ◽  
pp. 459-470 ◽  
Author(s):  
Lisheng He ◽  
Yuzhu Yang ◽  
Xiaolan Liu ◽  
Guangyan Liang ◽  
Chunyan Li ◽  
...  
Keyword(s):  
Oxidative Cyclization ◽  
Cyclization Reaction ◽  
Selective Synthesis ◽  
Reaction Conditions ◽  
Stepwise Synthesis

An iodine-mediated oxidative cyclization reaction between 2-(pyridin-2-yl)acetate derivatives and different alkynes has been developed, which provides regioselective and chemoselective syntheses of multiply substituted indolizines under modified reaction conditions. Plausible mechanisms have been proposed to explain the selective syntheses of indolizines. This protocol can be also applied to the stepwise synthesis of 2,2′-biindolizines.

Solvent-dependent copper-catalyzed synthesis of pyrazoles under aerobic conditions

2016 ◽  
Vol 52 (98) ◽  
pp. 14093-14096 ◽  
Author(s):  
Florian Pünner ◽  
Yoshihiro Sohtome ◽  
Mikiko Sodeoka
Keyword(s):  
Oxidative Cyclization ◽  
Selective Synthesis ◽  
Aerobic Conditions

We have developed a copper-catalyzed oxidative cyclization of hydrazones under aerobic conditions, enabling solvent-dependent selective synthesis of different pyrazoles.

ChemInform Abstract: Highly Selective Synthesis of Tetra-Substituted Furans and Cyclopropenes: Copper(I)-Catalyzed Formal Cycloadditions of Internal Aryl Alkynes and Diazoacetates.

ChemInform ◽  
2013 ◽  
Vol 44 (8) ◽  
pp. no-no
Author(s):  
Andrew K. Swenson ◽  
Kate E. Higgins ◽  
Metthew G. Brewer ◽  
William W. Brennessel ◽  
Michael G. Coleman
Keyword(s):  
Selective Synthesis ◽  
Substituted Furans ◽  
Aryl Alkynes

Hypoiodite-catalysed oxidative cyclisation of Michael adducts of chalcones with 1,3-dicarbonyl compounds: a facile and versatile approach to substituted furans and cyclopropanes

2016 ◽  
Vol 52 (89) ◽  
pp. 13097-13100 ◽  
Author(s):  
Wen-Chao Gao ◽  
Fei Hu ◽  
Jun Tian ◽  
Xing Li ◽  
Wen-Long Wei ◽  
...  
Keyword(s):  
Oxidative Cyclization ◽  
Dicarbonyl Compounds ◽  
Michael Adducts ◽  
Oxidative Cyclisation ◽  
Substituted Furans

Hypoiodite catalysis for selective oxidative cyclization has been developed, yielding either furans or cyclopropanes with excellent diastereoselectivity.

Sign in / Sign up

Export Citation Format

Share Document