How is methyl (E)-2-((3S,6'R,7'S,8a'S)-6'-ethyl-2-oxo-2',3',6',7',8',8a'-hexahydro-5'H-spiro[indoline-3,1'-indolizin]-7'-yl)-3-methoxyacrylate (CAS: 6859-01-4) typically synthesized?

This compound is typically synthesized by a multi-step process involving the preparation of the indolizinone ring followed by introduction of the methoxy group and the acrylate functional group. Common catalysts include Lewis acids, and the reaction conditions are optimized for high yield and selectivity. The exact synthesis route may vary depending on the specific starting materials and the desired product purity.