US11518729B2 - Processes for Preparing 5,5-Dimethyl-2-Oxo-3-Cyclopentene-1-Carboxylate Compounds and 3,5,5-Trimethyl-2-Oxo-3-Cyclopentene-1-Carboxylate Compounds from 3,3-Dimethyl-1-Butene-1,4-Dicarboxylate Compounds and 1,3,3-Trimethyl-1-Butene-1,4-Dicarboxylate Compounds, and 1,3,3-Trimethyl-1-Butene-1,4-Dicarboxylate Compounds | Patent Bear