Deciphering the Mechanistic Dichotomy in the Cyclization of 1-(2-Ethynylphenyl)-3,3-dialkyltriazenes: Competition between Pericyclic and Pseudocoarctate Pathways
摘要:
The mechanistic aspects of the cyclization of (2-ethynylphenyl)triazenes under both thermal and copper-mediated conditions are reported. For cyclization to an isoindazole, a carbene mechanistic pathway is proposed. The carbene intermediate can react with oxygen, dimerize to give an alkene, or be trapped either intermolecularly (using 2,3-dimethyl-2-butene to generate a cyclopropane) or intramolecularly (using a biphenyl moiety at the terminus of the acetylene to form a fluorene). Density-functional theory (DFT) calculations support a pseudocoarctate pathway for this type of cyclization. Thermal cyclization to give a cinnoline from (2-ethynylphenyl)triazenes is proposed to occur through a pericyclic pathway. DFT calculations predict a zwitterionic dehydrocinnolinium intermediate that is supported by deuterium trapping studies as well as cyclizations performed using a 2,2,6,6-tetramethylpiperidine moiety at the 3-position of the triazene.
[EN] METHODS OF TREATMENT OF AMYLOIDOSIS USING ASPARTYL-PROTEASE INIHIBITORS<br/>[FR] PROCEDES DE TRAITEMENT D'AMYLOIDOSE UTILISANT DES INHIBITEURS DE PROTEASE ASPARTYLE
申请人:ELAN PHARM INC
公开号:WO2005070407A1
公开(公告)日:2005-08-04
The invention relates to acetyl 2-hydroxy-1,3-diaminospirocyclohexanes and derivatives thereof that are useful in treating diseases, disorders, and conditions associated with amyloidosis. Amyloidosis refers to a collection of diseases, disorders, and conditions associated with abnormal deposition of A-beta protein.
[EN] SUBSTITUTED UREA AND CARBAMATE, PHENACYL-2-HYDROXY-3-DIAMINOALKANE, AND BENZAMIDE-2-HYDROXY-3-DIAMINOALKANE ASPARTYL-PROTEASE INHIBITORS<br/>[FR] UREE ET CARBAMATE SUBSTITUES, PHENACYL-2-HYDROXY-3-DIAMINOALCANE, ET BENZAMIDE-2-HYDROXY-3-DIAMINOALCANE INHIBITEURS D'ASPARTYL-PROTEASE
申请人:ELAN PHARM INC
公开号:WO2005087215A1
公开(公告)日:2005-09-22
The invention relates to acetyl 2-hydroxy-1,3-diaminospirocyclohexanes and derivatives thereof that are useful in treating at least one disease, disorder, and condition associated with amyloidosis. Amyloidosis refers to a collection of diseases, disorders, and condition associated with abnormal deposition of A-beta protein.
[EN] MITOCHONDRIAL COMPLEX I INHIBITORS AND METHODS OF USE<br/>[FR] INHIBITEURS DU COMPLEXE MITOCHONDRIAL I ET MÉTHODES D'UTILISATION
申请人:SANFORD BURNHAM PREBYS MEDICAL DISCOVERY INST
公开号:WO2021050547A1
公开(公告)日:2021-03-18
Disclosed herein are methods of using mitochondrial complex I inhibitors in the treatment of a disease or condition that would benefit from the inhibition of mitochondrial respiration. Also described herein are methods of treating a disease or condition such as prostate cancer and breast cancer by administering a mitochondrial complex I inhibitor in combination with a second therapeutic agent.
Processes for the preparation of biologically active chromanones are disclosed, including processes for the preparation of intermediates useful in the preparation of the biologically active chromanones. The chromanones and the intermediates disclosed herein may be useful for a variety of therapies, including the treatment of various cancers and the treatment of inflammation and inflammation related disorders.