One pot domino reaction accessing γ-nitroesters: synthesis of GABA derivatives
作者:Fabricio F. Naciuk、Debora Z. Vargas、Caroline R. M. D'Oca、Celso C. Moro、Dennis Russowsky
DOI:10.1039/c4nj01552e
日期:——
γ-Nitroesters are synthesized by theone potdomino process. GABA derivatives phenibut and baclofen were readily accessed.
γ-硝基酯通过一锅法多米诺过程合成。GABA衍生物苯硫胺和巴克洛芬可以轻松获得。
Immobilization of 1,5,7-triazabicyclo [4.4.0] dec-5-ene over mesoporous materials: An efficient catalyst for Michael-addition reactions under solvent-free condition
作者:Pranjal Kalita、Rajiv Kumar
DOI:10.1016/j.apcata.2011.03.010
日期:2011.4
Immobilization of 1,5,7-triazabicyclo [4.4.0] dec-5-ene (TBD, a bicylic guanidine base) over mesoporous material like SBA-15 has been found to be an excellent catalyst for Michael-addition of β-nitro styrene with malonate. The reactions were performed under solvent-free condition at 373 K for 9 h. A wide variety of Michael donors and acceptors were investigated. Among them, high yield of Michael product
Efficient Stereoselective Synthesis of Nitrocyclopropanes by the Oxidative Cyclization of Michael Adducts of Nitroolefins with Activated Methylene Compounds
作者:Renhua Fan、Yang Ye、Weixun Li、Lingfei Wang
DOI:10.1002/adsc.200800452
日期:2008.11.3
An efficientoxidative cyclopropanation of the Michaeladducts of nitroolefins with activatedmethylenecompounds by the combination of iodobenzene diacetate and tetrabutylammonium iodide is reported. Highly functionalized nitrocyclopropanes are synthesized in moderate to good yields via the Michael addition and cyclopropanation with high diastereoselectivity and enantioselectivity under mild conditions
Iodobenzene-Catalyzed Oxidative Cyclization for the Synthesis of Highly Functionalized Cyclopropanes
作者:Yang Li、Hao Guo、Renhua Fan
DOI:10.1055/s-0039-1690809
日期:2020.3
iodobenzene-catalyzed oxidative cyclization of Michael adducts of activated methylene compounds with nitroolefins or chalcones is developed. mCPBA is used as oxidant together with Bu4NI for the generation of a highly reactive iodine(III) species to mediate the cyclopropanation via a ligand exchange and reductive elimination process. A range of highly functionalized cyclopropanes are synthesized with
Bifunctional chiral organocatalytic compound having excellent enantioselectivity, preparation method therefor, and method for producing non-natural gamma-amino acid from nitro compound by using same
申请人:KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION
公开号:US11465135B2
公开(公告)日:2022-10-11
The present invention relates to a bifunctional chiral organocatalytic compound having excellent enantioselectivity, a preparation method therefor, and a method for producing a non-natural gamma amino acid from a nitro compound by using the chiral organocatalytic compound. According to the present invention, the bifunctional chiral organocatalytic compound having excellent enantioselectivity can be easily synthesized, gamma-amino acids with high optical selectivity can be obtained at a high yield by an economical and convenient method using the chiral organocatalytic compound, and various (R)-configuration gamma-amino acids, which are not present in nature, can be produced with high optical purity in large quantities by using a small amount of a catalyst, and therefore, the present invention can be widely utilized in various industrial fields including the pharmaceutical industry.