Asymmetric Catalytic 1,2-Hydroperoxidation of Isatin-Derived Ketimine with Hydrogen Peroxide in the Crowding Environment of PEGs
摘要:
The first enantioselective catalytic 1,2-hydroperoxidation has been achieved in the presence of PEG-600 using an acid base bifunctional chiral squaramide as the organocatalyst, affording a range of enantioenriched alpha-N-substituted hydroperoxides bearing an oxindole moiety with excellent stereoselectivities (up to 99% ee).
Oxaziridine-Mediated Amination of Primary Amines: Scope and Application to a One-Pot Pyrazole Synthesis
作者:Alan Armstrong、Lyn H. Jones、Jamie D. Knight、Richard D. Kelsey
DOI:10.1021/ol0474507
日期:2005.2.1
Electrophilic amination of primary aliphatic and aromatic amines is reported using a diethylketomalonate-derived oxaziridine to afford the corresponding N-Boc hydrazines in good to excellent yields. The method allows a one-pot synthesis of pyrazoles from primary amines. [Reaction: see text]
TOMCUFCIK, ANDREW S.;EMMA, JOHN E.;EUDY, NANCY H.;MARSICU, JOSEPH W.;NEWM+
作者:TOMCUFCIK, ANDREW S.、EMMA, JOHN E.、EUDY, NANCY H.、MARSICU, JOSEPH W.、NEWM+
DOI:——
日期:——
US4767749A
申请人:——
公开号:US4767749A
公开(公告)日:1988-08-30
US4894368A
申请人:——
公开号:US4894368A
公开(公告)日:1990-01-16
Asymmetric Catalytic 1,2-Hydroperoxidation of Isatin-Derived Ketimine with Hydrogen Peroxide in the Crowding Environment of PEGs
作者:Wengang Guo、Yan Liu、Can Li
DOI:10.1021/acs.orglett.7b00032
日期:2017.3.3
The first enantioselective catalytic 1,2-hydroperoxidation has been achieved in the presence of PEG-600 using an acid base bifunctional chiral squaramide as the organocatalyst, affording a range of enantioenriched alpha-N-substituted hydroperoxides bearing an oxindole moiety with excellent stereoselectivities (up to 99% ee).