Synthesis and Characterization of α,β-Unsaturated Hydroximoyl Chlorides and Hydroximates
作者:James E. Johnson、Ling Lu、Houquan Dai、Diana C. Canseco、Krista M. Small、Debra D. Dolliver、Frank R. Fronczek
DOI:10.1071/ch06188
日期:——
gives a mixture of all four possible isomers. Sodium methoxide was reacted with these isomers to determine the configuration about the carbon–carbon double bond for each. The Z-isomers reacted with sodium methoxide to give the corresponding alkyne by elimination whereas the E-isomers gave the substitution product. The configuration about the carbon–nitrogen double bond was determined from the 1H NMR chemical
制备了新的α,β-不饱和羟肟酰氯(PhC(Cl)=CHC(Cl)=NOCH3)和异羟肟酸盐(PhC(OCH3)=CHC(OCH3)=NOCH3)。PhC(Cl)=CHC(Cl)=NOCH3 的 ZZ 异构体由苯甲酰乙酸乙酯分四步制备。ZZ-异构体的紫外线照射产生所有四种可能异构体的混合物。甲醇钠与这些异构体反应以确定每个异构体的碳-碳双键构型。Z-异构体与甲醇钠反应通过消除产生相应的炔烃,而E-异构体产生取代产物。碳-氮双键的构型由 NOCH3 基团的 1H NMR 化学位移确定。