OH OH 10%NaoH CHO chcl Reimer Tiemann reaction 反应机理 Cl CHCI3 oh CCI eCCIOrganic Chemistry Organic Chemistry Xiamen Xiamen University University OH + CHC l 3 10%NaOH OH CHO R eime r-Tieman n reactio n CHCl 3 + OH CCl 3 CCl 2 Cl 反应机理