67421-74-3Relevant articles and documents
Divergent Synthesis of Enantioenriched β-Functional Amines via Desymmetrization of meso-Aziridines with Isocyanides
Li, Xiangqiang,Xiong, Qian,Guan, Mingming,Dong, Shunxi,Liu, Xiaohua,Feng, Xiaoming
supporting information, p. 6096 - 6101 (2019/08/20)
A highly enantioselective ring-opening desymmetrization of meso-aziridines with isocyanides was achieved in the presence of a chiral N,N′-dioxide/Mg(OTf)2 complex. The in situ generated chiral 1,4-zwitterionic intermediates were successfully trapped by intramolecular oxygen- and carbon-based nucleophiles or exogenous H2O and TMSN3, enabling a collective synthesis of various chiral vicinal amino-oxazoles, spiroindolines, β-amino amides, and tetrazole derivative in moderate to high yields with excellent enantioselectivities.
(DIHYDRO) IMIDAZOISO (5, 1-A) QUINOLINES AS FSH RECEPTOR AGONISTS FOR THE TREATMENT OF FERTILITY DISORDERS
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Page/Page column 97, (2010/12/26)
The invention relates to imidazoiso[5,1-a]quinoline and 5,6-dihydro-imidazoiso[5,1-a]quinoline derivatives according to general Formula (1) or a pharmaceutically acceptable salt thereof. The compounds can be used for the treatment of infertility.
A New Approach to Asymmetric Synthesis of Polycycles on the Basis of o-Quinodimethane Generation
Ito, Yoshihiko,Amino, Yusuke,Nakatsuka, Masashi,Saegusa, Takeo
, p. 1586 - 1590 (2007/10/02)
The fluoride anion induced 1,4-elimination of 2-phenyl>-3,3-dimethyloxazolidinium salts generates (E,E)-α-alkyl-α'--o-quinodimethane intermediates, which are trapped stereoselectively with dienophiles to give polycycles.Intramolecular cyclization of 2-phenyl>-3,3-dimethyl-4-(R)-methyl-5(R)-phenyloxazolidinium triflate at 0 deg C produces a 3:1 diastereoisomeric mixture of 6--trans-octahydrophenanthrene, which is converted by hydrogenolysis on Pd/C to trans-octahydrophenanthrene with D +46.6 deg (50percent ee).Similarly, intramolecular cyclization of 2-phenyl>-3,3-dimethyl-4(S)-methoxymethyl-5(S)-phenyloxazolidinium triflate produces, after hydrogenolysis on Pd/C, trans-octahydrophenanthrene with D -51.1 deg (55percent ee).The enantioselection in the cycloaddition with o-quinodimethane intermediate may be accounted for on the basis of ?-stacking interaction in the Diels-Alder transition state.