作者:F. Mathey
DOI:10.1016/0040-4020(76)87022-6
日期:1976.1
two-step synthesis of 2-acetyl and 2-carbethoxy-phospholes involves the metalation of monomeric 3,4-dimethyl phosphole sulfides by t-butyl-lithium followed by reaction with ethyl acetate and ethyl carbonate. The phosphole sulfides thus obtained are reduced by PBu3 or P(CH2CH2CN)3 to the phospholes 20–24. In the 2-acetyl-phosphole series, variable electron transfer from the dienic system and from the phosphorus
2-乙酰基和2-乙氧基-磷的两步合成涉及通过叔丁基锂将单体的3,4-二甲基磷硫化物金属化,然后与乙酸乙酯和碳酸乙酯反应。由此获得的磷杂环硫化物通过PBU降低3或P(CH 2 CH 2 CN)3至phospholes 20 - 24。在2-乙酰基-磷系列中,通过1 H和31 P NMR监测从二烯系和从磷原子到羰基的可变电子转移。2-羧基磷脂25的主要分解途径与吡咯和噻吩衍生物26和27形成鲜明对比的是,质谱仪中的P involvesC涉及PC环内键裂解和CO的损失。这些事实妨碍强2 p π -3 p π在磷杂核电子离域。