One-Pot Phosphine-Catalyzed Syntheses of Quinolines
摘要:
In this study we developed an efficient one-pot procedure for the preparation of 3-substituted and 3,4-disubstituted quinolines from stable starting materials (activated acetylenes reacting with o-tosylamidobenzaldehydes and o-tosylamidophenones, respectively) under mild conditions. The reaction appears to operate under a general base catalysis mechanism, instigated by the beta-phosphonium enoate alpha-vinyl anion generated in situ through nucleophilic addition of PPh3 to the activated alkyne. Michael addition of the deprotonated tosylamides to the activated alkynes and subsequent rapid aldol cyclization led to the formation of labile N-tosyldihydroquinoline intermediates. Driven by aromatization, detosylation of the dihydroquinoline intermediates occurred readily in the presence of dilute aqueous HCl to give the final quinoline products.
CASEIN KINASE 1delta (CK 1delta) INHIBITORS AND THEIR USE IN THE TREATMENT OF NEURODE-GENERATIVE DISEASES SUCH AS TAUOPATHIES
申请人:Sheridan Joseph M.
公开号:US20140031547A1
公开(公告)日:2014-01-30
The invention relates to pharmaceutical compositions comprising casein kinase 1 delta (CK1δ) and to the use of said inhibitors in the treatment of neurodegenerative disorders such as Alzheimer's disease.
CASEIN KINASE 1delta (CK 1delta) INHIBITORS AND THEIR USE IN THE TREATMENT OF NEURODEGENERATIVE DISEASES SUCH AS TAUOPATHIES
申请人:Electrophoretics Limited
公开号:US20160354375A1
公开(公告)日:2016-12-08
The invention relates to pharmaceutical compositions comprising casein kinase 1 delta (CK1δ) and to the use of said inhibitors in the treatment of neurodegenerative disorders such as Alzheimer's disease.
One-Pot Phosphine-Catalyzed Syntheses of Quinolines
作者:San Khong、Ohyun Kwon
DOI:10.1021/jo3015825
日期:2012.9.21
In this study we developed an efficient one-pot procedure for the preparation of 3-substituted and 3,4-disubstituted quinolines from stable starting materials (activated acetylenes reacting with o-tosylamidobenzaldehydes and o-tosylamidophenones, respectively) under mild conditions. The reaction appears to operate under a general base catalysis mechanism, instigated by the beta-phosphonium enoate alpha-vinyl anion generated in situ through nucleophilic addition of PPh3 to the activated alkyne. Michael addition of the deprotonated tosylamides to the activated alkynes and subsequent rapid aldol cyclization led to the formation of labile N-tosyldihydroquinoline intermediates. Driven by aromatization, detosylation of the dihydroquinoline intermediates occurred readily in the presence of dilute aqueous HCl to give the final quinoline products.