Stereo-, Regio-, and Chemoselective [3 + 2]-Cycloaddition of (2<i>E</i>,4<i>E</i>)-Ethyl 5-(Phenylsulfonyl)penta-2,4-dienoate with Various Azomethine Ylides, Nitrones, and Nitrile Oxides: Synthesis of Pyrrolidine, Isoxazolidine, and Isoxazoline Derivatives and a Computational Study
作者:Ulaganathan Sankar、Ch. Venkata Surya Kumar、V. Subramanian、K. K. Balasubramanian、S. Mahalakshimi
DOI:10.1021/acs.joc.5b02845
日期:2016.3.18
One-pot chemo-, regio-, and stereoselective synthesis of series of heterocyclic and spiroheterocyclic compounds was accomplished through mono- and bis[3 + 2]-cycloaddition reactions of (2E,4E)-ethyl 5-(phenylsulfonyl)penta-2,4-dienoate as a dipolarophile with azomethine ylides, nitrones, and nitrile oxides in good yields. The structures of the products were established by spectroscopic techniques as