作者:Elie Elia Aboujaoude、Noël Collignon、Philippe Savignac
DOI:10.1016/s0040-4020(01)96436-1
日期:1985.1
condensation of functional phosphonates bearing strongly withdrawing groups (RO)2P(O)CH2Z1 with dimethylformamide dimethyl acetal gives corresponding β-functional, β-phosphonic enamines (RO)2P(O)C(Z)=CHNMe22. Acid or basic hydrolysis of the enamines frequently gives the free aldehyde (RO)2P(O)CH(Z)—CHO 3. We show that the enamines can be used with success for the synthesis of heterocycles like, pyrazoles
带有强吸收基团(RO)2 P(O)CH 2 Z1的功能性膦酸酯与二甲基甲酰胺二甲基乙缩醛的热缩合得到相应的β-官能的β-膦烯胺(RO)2 P(O)C(Z)= CHNMe 2 2。烯胺的酸或碱水解经常产生游离醛(RO)2 P(O)CH(Z)-CHO 3。我们表明烯胺可以成功地用于合成杂环,如吡唑4,嘧啶5,苯并二氮杂6或吲哚7,它们全部被膦酸酯基团取代。