Darzens reaction as a convenient method for the synthesis of ?-chloroketones, ?-chloroepoxides, and symmetrically substituted dioxines
作者:V. A. Mamedov、I. A. Litvinov、O. N. Kataeva、I. Kh. Rizvanov、I. A. Nuretdinov
DOI:10.1007/bf00811092
日期:1994.12
The Darzens reaction of dichloroacetophenone (DCAP) with substituted benzaldehydes has been studied. The structure of the products was shown to depend on the phenyl group substituents. Reaction of benzaldehyde, 4-bromo-, and 2,4-dichlorobenzaldehydes results in 1-phenyl-3-aryl-3-chloropropane-1,2-diones (2a-c), reaction of para- or meta-nitrobenzaldehydes yields 1-phenyl-2-chloro-3-aryl-2,3-epoxypropane-1-ones (3a, b). Upon the introduction of an alkoxy group into the phenyl ring of benzaldexyde and/or dichloroacetophenone, symmetrically substituted dioxines were obtained (6a-c). The structure of the reaction products has been established by single crystal X-ray investigations.