Synthesis of the Spiro Derivatives of 1,2-Oxaphosphetes by [2+2] Cycloaddition of Cyclic 1-(2,4,6-Triisopropylphenyl)phosphine Oxides with Dimethyl Acetylenedicarboxylate
作者:György Keglevich、Henrietta Forintos、György Miklós Keserű、László Hegedűs、László Tőke
DOI:10.1016/s0040-4020(00)00401-4
日期:2000.6
Members of a new heterocyclic family, 1,2-oxaphosphetes were prepared by the unexpected [2+2] cycloaddition of the PO group of 1-(2,4,6-triisopropylphenyl) P-heterocycles with the acetylene moiety of dimethyl acetylenedicarboxylate. The new oxaphosphetes are spiro derivatives of the starting heterocycles and exhibit a phosphorus atom with trigonal bipyramidal geometry. PM3 semiempirical calculations
通过将1-(2,4,6-三异丙基苯基)P-杂环的PO基团与二甲基的乙炔部分进行意外的[2 + 2]环加成反应,制得新的杂环家族1,2-氧杂磷的成员乙炔二羧酸盐。新的氧杂磷是起始杂环的螺环衍生物,并显示具有三角双锥体几何形状的磷原子。PM3半经验计算证明了新的反应路径并提出了逐步反应机理。