Unusual Regioselectivity in the Aldehyde Addition Reactions of Allenyl/Propargyl Zirconium Complexes Derived from γ-(2-Pyridyl)propargyl Ethers: Synthesis of Multisubstituted α-Hydroxyallenes
作者:Guoqin Fan、Xin Xie、Yuanhong Liu、Yuxue Li
DOI:10.1021/om301007z
日期:2013.3.25
different to that of the reactions using propargylic ethers without a pyridyl group reported so far, in which homopropargyl alcohols were formed predominantly. The structure of allenylzirconium intermediate has been confirmed by X-ray crystal analysis which reveals an intramolecular Zr–N coordination. DFT calculations suggest that the smaller steric effect of the pyridine ring compared with the phenyl
The synthesis of regio- and stereoselective arylsubstitutedα,β-unsaturated aldehydes and ketones from activated allenes was achieved. This mild and non-metallic oxidation is exclusively driven by benign ambient air and triggered by visible light. The same starting materials under ideal anaerobic conditions led to the 2,3-diphenylselenation adduct with no trace of oxygenated products, demonstrating
USE OF PYRIDYL ALKANE, PYRIDYL ALKENE AND/OR PYRIDYL ALKINE ACID AMIDES IN THE TREATMENT OF TUMORS OR FOR IMMUNOSUPPRESSION
申请人:Klinge Pharma GmbH
公开号:EP0912176A1
公开(公告)日:1999-05-06
[EN] USE OF PYRIDYL ALKANE, PYRIDYL ALKENE AND/OR PYRIDYL ALKINE ACID AMIDES IN THE TREATMENT OF TUMORS OR FOR IMMUNOSUPPRESSION<br/>[FR] UTILISATION D'AMIDES PYRIDYL-ALCANE, PYRIDYL-ALCENE ET/OU PYRIDYL-ALCYNE ACIDES DANS LE TRAITEMENT DES TUMEURS ET POUR L'IMMUNOSUPPRESSION
申请人:KLINGE PHARMA GMBH
公开号:WO1997048397A1
公开(公告)日:1997-12-24
(EN) The invention relates to the use of pharmacologically valuable pyridyl alkane, pyridyl alkene and/or pyridyl alkine acid amides according to general formula (I) in the treatment of tumors or for immunosuppression.(FR) L'invention concerne l'utilisation d'amides pyridyl-alcane, pyridyl-alcène et/ou pyridyl-alcyne acides pharmaceutiquement intéressants, de formule générale (I), pour traiter les tumeurs ou pour provoquer une immunosuppression.