141120-54-9Relevant academic research and scientific papers
Cerium(IV) oxidations of β-aminoketones, VIII: Synthesis of 1,2,3,4-tetrahydroisoquinolines with differently substituted piperidine parts
Holzgrabe,Inkman
, p. 209 - 215 (1993)
1- and 3-Alkyl- and/or aryl substituted tetrahydroisoquinolines are obtained by oxidative cyclisation of N-benzyl-β-aminoketones with cerium(IV) sulphate. In nearly all cases formation of mixtures of diastereomeres is observed. If the ketone function is r
Asymmetric aza-Diels-Alder reaction: Enantio- and diastereoselective reaction of imine mediated by Chiral Lewis acid
Hattori, Kouji,Yamamoto, Hisashi
, p. 1749 - 1760 (2007/10/02)
An efficient asymmetric aza-Diels-Alder reaction using chiral boron mediator is developed. The key to its success is the use of the chiral boron complex prepared in situ from (R)- or (S)- binaphthol and B(OPh)3. The enantiomeric reaction of prochiral imine affords products of up to 90% ee. The double asymmetric induction of chiral imine using α-benzylamine as a chiral auxiliary is achieved with almost complete diastereoselectivity for both aliphatic and aromatic aldimines. This method is applied to the efficient synthesis anabasine and coniine of piperidine alkaloides.
Asymmetric Aza-Diels-Alder Reaction Mediated by Chiral Boron Reagent
Hattori, Kouji,Yamamoto, Hisashi
, p. 3264 - 3265 (2007/10/02)
An asymmetric aza-Diels-Alder reaction of an imine mediated by an in situ generated chiral boron complex is described.The method is successful with several aldimines and affords products of up to 90percent ee.
