Regio- and Stereoselective Synthesis of Isoindolin-1-ones via Electrophilic Cyclization
摘要:
A variety of substituted isoindolin-l-ones are readily prepared in good to excellent yields under very mild reaction conditions by the reaction of o-(1-alkynyl)benzamides with ICI, I-2, and NBS. In a few cases, substituted isoquinolin-1-ones were obtained as the major product instead. This methodology accommodates various alkynyl amides and functional groups and has been successfully extended to heterocyclic starting materials. This chemistry has been successfully applied to the synthesis of a biologically interesting alkaloid, cepharanone B.
Solution-Phase Parallel Synthesis of a Multisubstituted Cyclic Imidate Library
作者:Saurabh Mehta、Jesse P. Waldo、Benjamin Neuenswander、Gerald H. Lushington、Richard C. Larock
DOI:10.1021/co3001605
日期:2013.5.13
a diverse 71-member library of multisubstituted cyclic imidates is described. The key intermediates, 3-iodomethylene-containing cyclic imidates, are readily prepared in good to excellent yields by the palladium/copper-catalyzed cross-coupling of various o-iodobenzamides and terminal alkynes, followed by electrophilic cyclization with I2. These cyclic imidates were further functionalized by palladium-catalyzed