Cycloadditions of vinyl isocyanate and isothiocyanate with oxovinylidene- and phenyliminovinylidenetriphenylphosphoranes
作者:Ladislav Kniežo、Pavol Kristian、Ján Imrich、Franco Ugozzoli、Giovanni Dario Andreetti
DOI:10.1016/s0040-4020(01)85843-9
日期:1988.1
N-phenyliminovinylidenetriphenylphosphorane enter cycloaddition reactions with vinyl isocyanate and vinyl isothiocyanates and giving exclusively [4+2] cycloaddition products, i.e. derivatives of 3-triphenylphosphoranopyrid-2-one and or 3-triphenylphosphoranopyridine-2-thione (, and ), in contrast with alkyl or aryl isocyanates or isothiocyanates. The structure of the obtained cycloadducts was determined
Oxovinylidenetriphenylphosphorane和N- phenyliminovinylidenetriphenylphosphorane进入环加成反应与乙烯基异氰酸酯和乙烯基异硫氰酸酯和专门给予[4 + 2]环加成产物,3- triphenylphosphoranopyrid -2-酮的即衍生物和或3- triphenylphosphoranopyridine -2-硫酮(,和),在与烷基或芳基异氰酸酯或异硫氰酸酯形成对比。所获得的cycloadducts结构通过光谱方法测定和由吡啶-2-硫酮衍生物的脱硫确认和X射线衍射4-苯基亚氨基-3- triphenylphosphoranopyrid -2-酮的分析和4-苯基亚氨基-3- triphenylphosphoranopyridine- 2-硫酮。