Catalytic Diastereo- and Enantioselective Annulations between Transient Nitrosoalkenes and Indoles
作者:Yu Zhang、David Stephens、Graciela Hernandez、Rosalinda Mendoza、Oleg V. Larionov
DOI:10.1002/chem.201203435
日期:2012.12.21
Caught in transition: An efficient catalytic system is the key to the successful development of the first highly diastereo‐ and enantioselectiveannulation reaction betweenindoles and transientnitrosoalkenes. This robust reaction affords structurally unique architectures with up to three new chiral centers. The products can be readily elaborated into other indoline‐based chiral heterocyclic motifs
An efficient synthesis of 2-isoxazolines from α-haloketone oximes and dimethyl sulfonium salts
作者:Sen Zhao、Hang Wang、Shaofa Sun、Haibing Guo、Zhiyu Chen、Jian Wang、Lu Wang、Steven Liang、Gangqiang Wang
DOI:10.1016/j.tetlet.2018.12.062
日期:2019.1
2-Isoxazolines were synthesized efficiently from a formal [4+1] cycloaddition of nitrosoalkenes and sulfurylides, which were generated in situ from α-haloketone oximes and dimethyl sulfonium salts. This approach provides a new method to synthesize a range of 2-isoxazolines in high yields and high regioselectivity.
[EN] SYNTHESES OF METAL HETEROCYCLIC CARBENE ENOLATES AS COUPLING REACTIONS CATALYSTS<br/>[FR] SYNTHÈSES D'ÉNOLATES ET DE CARBÈNES HÉTÉROCYCLIQUES MÉTALLIQUES COMME CATALYSEURS DE RÉACTIONS DE COUPLAGE
申请人:COSKUN NEJDET
公开号:WO2017099693A1
公开(公告)日:2017-06-15
The invention relates to the synthesis methods of N-heterocyclic carbene NHCE metal complexes and their catalytic activities in carbon-carbon coupling reactions.
The first catalytic inverse-electron demand hetero-Diels–Alder reaction of nitroso alkenes using pyrrolidine as an organocatalyst
作者:Tobias C. Wabnitz、Steen Saaby、Karl Anker Jørgensen
DOI:10.1039/b316518c
日期:——
The first catalytic inverse-electron demand hetero-Diels-Alderreaction of nitroso alkenes has been developed. Nitroso alkenes were generated in situ from alpha-halooximes and underwent [4 + 2]-cycloadditions with enamines as dienophiles formed from aldehydes and pyrrolidine (10 mol%) as an organocatalyst. The presence of a suitable heterogeneous buffer system was found to be essential and best results
Synthesis and Beckmann rearrangement of novel (Z)-2-organylselanyl ketoximes: promising agents against grapevine anthracnose infection
作者:Bianca Waskow、Renata A. Mano、Rafaela X. Giacomini、Daniela H. Oliveira、Ricardo F. Schumacher、Ethel A. Wilhelm、Cristiane Luchese、Lucielli Savegnago、Raquel G. Jacob
DOI:10.1016/j.tetlet.2016.10.078
日期:2016.12
substitution reaction of E/Z mixtures of 2-bromo ketoximes with nucleophilic species of selenium, which were generated in situ by simple cleavage of diorganyl diselenides with NaBH4 using ethanol/THF as solvent. The new 2-organylselanyl ketoximes were synthesized in moderate to good yields and with selectivity for the (Z)-configuration. The synthesized (Z)-2-arylselanylacetophenone oximes were submitted to