The reaction of nitriles without α hydrogen atoms on phosphol 3 enes oxides or sulfides anions yields 1-aza 2-phospha cyclohepta 4,6 dienes. 1–2 or 1–4 addition to the pyridine ring may occur with nicotino- and isonicotinonitriles, instead of attack on the nitrile function in this reaction. Trichlorosilane does not reduce these seven membered P oxides to the corresponding phosphines but causes a ring
没有α氢原子的腈在
磷3烯的氧化物或
硫化物阴离子上的反应生成1-氮杂2-
磷环庚七4,6二烯。
烟腈和异
烟腈可能会在
吡啶环上加成1-2或1-4,而不是在此反应中破坏腈的功能。三
氯硅烷不会将这七个P氧化物还原为相应的膦,但会引起环收缩。