Simple Method for the Preparation of Dialkyl (2,3-Dihydro-1,3-thiazol-2-YL)-phosphonates
作者:Karolina Janikowska、Sławomir Makowiec
DOI:10.1080/10426501003767110
日期:2010.12.30
Abstract A simple synthesis of dialkyl (2,3-dihydro-1,3-thiazol-2-yl)-phosphonates from thiazolium salts and trialkyl phosphites is described. The series of dialkyl (2,3-dihydro-1,3-thiazol-2-yl)-phosphonates with various substituents in positions 3, 4, and 5 of the thiazole ring were prepared. However, only phosphonates with an aryl on the nitrogen atom were stable enough for chromatographic purification
摘要 描述了从噻唑鎓盐和亚磷酸三烷基酯简单合成 (2,3-二氢-1,3-噻唑-2-基)-膦酸二烷基酯的方法。制备了在噻唑环的 3、4 和 5 位具有各种取代基的二烷基 (2,3-二氢-1,3-噻唑-2-基)-膦酸酯系列。然而,只有在氮原子上带有芳基的膦酸酯才足够稳定以进行色谱纯化,尽管所有新的膦酸酯都对氧化非常敏感。我们努力在 Horner-Wadsworth-Emmons 反应中应用 (2,3-二氢-1,3-噻唑-2-基)-膦酸二烷基酯,但生成的膦酸反芳香阴离子即使在 -70°C 下也能迅速分解. 图形概要