Unusual Transformation of Cyclobutenediones into Butenolides

  title={Unusual Transformation of Cyclobutenediones into Butenolides},
  author={Harold W. Moore and Kwan Hee Lee},
Butenolides are prepared from cyclobutenediones when cyclobutenediones are treated with lithi methylsilylacetylene, and quenched with water. A plausible mechanism, which contains an allene as an interme proposed. The usual diradical intermediate may not be formed because of the bulkiness of trimethylsilyl group, allenic intermediate may be stabilized by the… CONTINUE READING