ORGANIC CHEMISTRY Chapter 17 O LDA CeHs-C-CHCH C6H5s-C=CHCH3 CkHsSe- Br O HO CAHs-C-CHCH Secchi 25°C O C6H5-C-CH=CH2 CHs SeOh Department of Chemistry, Xiamen UniversityORGANIC CHEMISTRY Department of Chemistry, Xiamen University Chapter 17 C6H5 C CH2CH3 O LDA C6H5 C CHCH3 O C6H5Se Br C6H5 C CHCH3 O SeC6H5 H2O2 25°C C6H5 C CH O CH2 + C6H5SeOH