Efficient Synthesis of Isoquinoline Derivatives via AgOTf/Cu(OTf)2-Cocatalyzed Cyclization of 2-Alkynyl Benzaldoxime
摘要:
An efficient, AgOTf and Cu(OTf)(2) multicatalytic intramolecular cycloisomerization of 2-alkynylbenzaldoxime is reported. Isoquinoline N-oxides have been found to be deoxygenated to the corresponding quinolines in good yields in dimethylformamide/dichloroethane (v/v 5:1) as solvent at 120 degrees C.
[EN] HEPATITIS C VIRUS INHIBITORS<br/>[FR] INHIBITEURS DU VIRUS DE L'HEPATITE C
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2003099274A1
公开(公告)日:2003-12-04
Hepatitis C virus inhibitors are disclosed having the general formula:(I) wherein R1, R2, R3, R', B, Y and X are described in the description. Compositions comprising the compounds and methods for using the compounds toinhibit HCV are also disclosed.
Silver Triflate Catalyzed Reaction of 2-Alkynylbenzaldoxime with Phenol: A General and Facile Route to 1-Aroxyisoquinolines
作者:Zhiyong Wang、Jie Wu、Danqing Zheng
DOI:10.1055/s-0030-1260121
日期:2011.9
2-Alkynylbenzaldoxime reacts with phenol under the catalysis of silver triflate in the presence of bromo-tris-pyrrolidino-phosphonium hexafluorophosphate (PyBroP) under mild conditions, leading to the formation of 1-aroxyisoquinolines in good to excellent yields. cyclizations - isoquinoline - phosphorus ligands - phenol - silver triflate
AgOTf-catalyzed one-pot reactions of 2-alkynylbenzaldoximes with various alpha,beta-unsaturated carbonyl compounds under mild conditions are described, which provides a facile and efficient pathway for the synthesis of 1-alkylated isoquinoline derivatives. The method tolerates a wide range of substrates and allows for the preparation of the products of interest in moderate to excellent yields.
A one-pot two-step reaction of 2-alkynylbenzaldoximes with aryl halides has been developed, which offers the 1-position arylated 1,3-disubstituted isoquinolineN-oxides in moderate to good yields in most cases. The isoquinolineN-oxide intermediate was prepared in situ without isolation.
Hepatitis C virus inhibitors are disclosed having the general formula:
1
wherein R
1
, R
2
, R
3
, R′, B, Y and X are described in the description.
Compositions comprising the compounds and methods for using the compounds to inhibit HCV are also disclosed.