Stereoselective Synthesis of 3-Methyleneisoindolin-1-ones via Base-Catalyzed Intermolecular Reactions of Electron-Deficient Alkynes with N-Hydroxyphthalimides
摘要:
Highly stereoselective intermolecular reactions of electron-deficient alkynes with N-hydroxyphthalimides for efficient construction of N-unprotected 3-methyleneisoindolin-1-ones have been developed through base catalytic strategies. The reaction of alkynoates with N-hydroxyphthalimides catalyzed by Bu3P in DMF at 150 degrees C gave the corresponding 3-methyleneisoindolin-1-ones with a (Z)-configuration, while the reaction of alkynoates with N-hydroxyphthalimides catalyzed by K2CO3 in DMF at 60 degrees C gave the corresponding 3-methyleneisoindolin-1-ones with an (E)-configuration, and (Z)-3-methyleneisoindolin-1-ones were obtained when alkyne ketones reacted with N-hydroxyphthalimide.
Phosphine-Catalyzed [3+2] Annulation of Electron-Deficient Alkynes with<i>N</i>-Hydroxyphthalimide: Synthesis of 3a-Hydroxyisoxazolo[3,2-<i>a</i>]isoindol-8(3a<i>H</i>)-ones
作者:Qing-Fa Zhou、Xue-Ping Chu、Fei-Fei Ge、Yue Wang、Tao Lu
DOI:10.1002/adsc.201300426
日期:2013.10.11
AbstractThe phosphine‐catalyzed [3+2] annulation of electron‐deficient alkynes with N‐hydroxyphthalimide has been developed to give a variety of pharmaceutically attractive 3a‐hydroxyisoxazolo[3,2‐a]isoindol‐8(3aH)‐ones in good to excellent yields.magnified image
Stereoselective Synthesis of 3-Methyleneisoindolin-1-ones via Base-Catalyzed Intermolecular Reactions of Electron-Deficient Alkynes with <i>N</i>-Hydroxyphthalimides
作者:Xin Chen、Fei-Fei Ge、Tao Lu、Qing-Fa Zhou
DOI:10.1021/acs.joc.5b00002
日期:2015.3.20
Highly stereoselective intermolecular reactions of electron-deficient alkynes with N-hydroxyphthalimides for efficient construction of N-unprotected 3-methyleneisoindolin-1-ones have been developed through base catalytic strategies. The reaction of alkynoates with N-hydroxyphthalimides catalyzed by Bu3P in DMF at 150 degrees C gave the corresponding 3-methyleneisoindolin-1-ones with a (Z)-configuration, while the reaction of alkynoates with N-hydroxyphthalimides catalyzed by K2CO3 in DMF at 60 degrees C gave the corresponding 3-methyleneisoindolin-1-ones with an (E)-configuration, and (Z)-3-methyleneisoindolin-1-ones were obtained when alkyne ketones reacted with N-hydroxyphthalimide.