作者:Valeh Mehralioǧlu Ismailov、Adnan Aydin、Fizuddin Guseynov
DOI:10.1016/s0040-4020(99)00429-9
日期:1999.7
add thiols, amides and ethyleneimine to give stable hemi-thioacetals, hemiamidals and hemiaminal. From the silyl ether of hemiisopropyl thioacetal above 140°C, an α-ketophosphonate is obtained by the elimination of silane followed by the rearrangement of the oxirane intermediate. Alkylations of α-phosphorylated aldehydes with alkyl bromides gave enol ethers. However, dihalogenoalkanes such as 1,2-dibromoethane
描述了用于α-磷酸化醛的选择性氯化的条件,作为合成α-单氯和α,α-二氯取代的衍生物的手段。二氯衍生物显示出高反应活性,并容易添加硫醇,酰胺和亚乙基亚胺,从而获得稳定的半硫缩醛,半缩醛和半缩醛。从140℃以上的半异丙基硫缩醛的甲硅烷基醚中,通过除去硅烷,然后重新排列环氧乙烷中间体,得到α-酮膦酸酯。α-磷酸化醛与烷基溴的烷基化得到烯醇醚。然而,二卤代烷烃,例如1,2-二溴乙烷或1,3-二溴丙烷与烯醇醚一起产生磷酸环戊烷,它们都是反式构型。