Construction of 5-methyleneoxazolidine-2,4-diones bearing modifiable halogen groups through a halopalladation strategy.

Based on a halopalladation strategy, we successfully developed a haloesterification reaction of propargylic amides to synthesize a diverse range of 5-(halomethylene)oxazolidine-2,4-diones. This reaction demonstrates good yield and compatibility with various functional groups. Notably, the halogen atoms present in the resulting products can be readily substituted by other functional groups, highlighting the versatility and appeal of this method. Additionally, we have achieved the successful cyclizative dimerization of propargylic amides to produce bisoxazolidine-2,4-dione derivatives.