反应详情

The product from Example 2c (223 mg, 1.52 mmol) was reacted with 2-ethoxymethylene-malonic acid diethyl ester 0.350 mL, 1.75 mmol) following the procedure in Example 1a to give the title compound after silica gel column chromatography eluting with EtOAc/hexane (386 mg, 80%).