The First α-Fluoroallenylphosphonate, the Synthesis of Conjugated Fluoroenynes, and the Stereoselective Synthesis of Vinylfluorophosphonates Using a New Multifunctional Fluorine-Containing Building Block
作者:Antonio J. Zapata、Yonghong Gu、Gerald B. Hammond
DOI:10.1021/jo991620p
日期:2000.1.1
silyl group yields H(2)C=C=CFP(O)(OEt)(2) through an allenyl-propargyl resonance stabilized anion. The allene moiety has been used as template in the stereoselective synthesis of alpha-fluoro-beta, gamma-diiodopropenyl phosphonate, via electrophilic iodination, and alpha-fluoro-gamma-amino-alpha,beta-unsaturated phosphonates, including unsaturated phosphononucleosides, by nucleophilic displacement of
目前在复杂的α-氟代膦酸酯中引入CF(2)和CFH的方法的局限性导致合成了含氟的结构单元TIPS-C&tbd1; CCFXP(O)(OEt)(2),其中X = H或F.该多功能氟合成子在WHE条件下与羰基化合物反应,以得到高产率的氟化共轭烯炔和烯二炔。当X = F时,除去TIPS后用亲电试剂捕获去甲硅烷基化的阴离子可独家获得α-氟代膦酸酯的γ-取代衍生物。当X = H时,通过甲硅烷基-炔丙基共振稳定的阴离子,TBAF甲硅烷基的脱保护反应得到H(2)C = C = CFP(O)(OEt)(2)。该丙二烯部分已通过亲电子碘化用作α-氟-β-γ-二碘丙烯基膦酸酯的立体选择性合成的模板,烯丙基碘的亲核取代,以及α-氟代-γ-氨基-α,β-不饱和膦酸酯,包括不饱和膦酰核苷。H(2)C = C = CFP(O)(OEt)(2)使用仲胺进行加氢胺化生成(Z)-α-氟代氨基膦酸酯,而Diels-Alder