The convenient synthesis of 4-arylmethylidene-4,5- dihydro-3-phenylisoxazol-5-ones
作者:Keyume Ablajan、Hainimu Xiamuxi
DOI:10.1016/j.cclet.2010.09.023
日期:2011.2
Abstract 4-Arylmethylidene-4,5-dihydro-3-phenylisoxazol-5-ones were synthesized by the convenient three-component reaction of ethylbenzoylacetate, hydroxylamine and aromatic aldehydes in the presence of pyridine. The target compounds were also obtained by the reaction between 3-phenylisoxazol-5-one and aromatic aldehydes at 105 °C under solvent free condition. Yields of products depended considerably
Asymmetric α-Regioselective [3 + 2] Annulation of Morita–Baylis–Hillman Carbonates: Construction of Three Contiguous Stereocenters with Vicinal Quaternary Carbon Centers
作者:Xiaochen Tian、Yongxing Zhang、Hao Dong、Weiwu Ren、Yang Wang
DOI:10.1021/acs.joc.2c00582
日期:2022.8.5
spirocyclic oxindole derivatives containing three contiguous stereogenic centers and vicinal all-carbonquaternarychiralcenters. This reaction exhibits a broad substrate scope and excellent functional group tolerance. Excellent yields with high diastereo- and enantioselectivities were obtained in this efficient organocatalytic reaction.