Five resonance-stabilized bisphosphoranes were prepared for the object of the future work. Preliminary examination was carried out in order to make clear the reactivity of the resonance-stabilized bisphosphoranes with the six aromatic monoaldehydes by the Wittig reaction. An unexpected ester exchange reaction of ethyleneglycol bischloroacetate (1) was discussed in the case of 9, 6-dioxa-2, 7-dioxoheptane-1, 8-bistriphenylphosphonium ...
![2-[4-[2-(4-oxaldehydoylphenyl)ethyl]phenyl]-2-oxo-acetaldehyde结构式](https://image.chemsrc.com/caspic/265/13516-56-8.png)
![2-bromo-1-[4-[[4-(2-bromoacetyl)phenyl]methyl]phenyl]ethanone结构式](https://image.chemsrc.com/caspic/271/4072-68-8.png)