Gold vs Rhodium Catalysis: Tuning Reactivity through Catalyst Control in the C–H Alkynylation of Isoquinolones
作者:Aslam C. Shaikh、Dinesh R. Shinde、Nitin T. Patil
DOI:10.1021/acs.orglett.6b00175
日期:2016.3.4
A site-selective C-4/C-8 alkynylation of isoquinolones catalyzed by gold and rhodium complexes is reported. A broad range of synthetically useful functional groups (−F, −Cl, −Br, −CF3, −OMe, alkyl, etc.) were tolerated, providing an efficient and robust protocol for the synthesis either C-4- or C-8-alkynylated isoquinolones.
α′,α′-disilylated tertiary benzamides as dual ortho- and α′-carbanion synthons
作者:J.-C. Cuevas、P. Patil、V. Snieckus
DOI:10.1016/s0040-4039(01)93485-9
日期:1989.1
α′,α′-Disilylated benzamides 2, prepared by LiTMP/TMSCl in situ trap procedure, constitute ortho- and α′-carbanion synthons which provide N-benzoyl enamines (5), isoquinolines (6), dibenzoazocines (9) by Peterson olefination, and pyrroles (11) by cycloaddition. The conversion of 2 into other useful functionality is described.
with vinylene carbonate for the synthesis of isoquinolinones and pyridinones has been developed. This protocol employing inexpensive Co(III) as the catalyst tolerated diverse functional groups and substitution patterns, affording the target products with good to excellent yields. The synthetic utility of this transformation was demonstrated by a three-step synthesis of gusanlung D, 8-oxopseudopalmatine
Novel compounds of formulae (I) to (VIII), which more particularly include sulfonylurea derivatives, sulfonylthiourea derivatives, sulfonylguanidine derivatives, sulfonylcyanoguanidine derivatives, thioacylsulfonamide derivatives, and acylsulfonamide derivatives which are effective platelet ADP receptor inhibitors. These derivatives may be used in various pharmaceutical compositions, and are particularly effective for the prevention and/or treatment of cardiovascular diseases, particularly those diseases related to thrombosis. The invention also relates to a method for preventing or treating thrombosis in a mammal comprising the step of administering a therapeutically effective amount of a compound of formulae (I) to (VIII), or a pharmaceutically acceptable salt thereof.
BF<sub>3</sub>⋅Et<sub>2</sub>O‐Catalyzed Selective C‐4 Alkylation of Isoquinolin‐1(2<i>H</i>)‐ones Employing <i>p</i>‐Quinone Methides
作者:Devidas A. More、Ganesh S. Ghotekar、M. Muthukrishnan
DOI:10.1002/asia.202300546
日期:2023.9
A practical and efficient synthesis of C-4 alkylated isoquinolin-1(2H)-ones through conjugate addition of isoquinolin-1(2H)-ones to p-quinone methides is reported. The reaction is facilitated by Lewis acid catalysis and provides a wide range of C-4 alkylated isoquinolin-1(2H)-ones at ambient temperature in good to excellent yields.
报道了通过异喹啉-1(2 H )-酮与对醌甲基化物的共轭加成来实用且有效地合成C-4烷基化异喹啉-1(2 H )-酮。该反应由路易斯酸催化促进,并在环境温度下以良好至优异的收率提供多种 C-4 烷基化异喹啉-1(2 H )-酮。