1: 1-(chloromethyl)-2-fluorobenzene With iodine; magnesium in diethyl ether 2 h; Heating / reflux; 2: cyclopropanecarboxylic acid diisopropylamide in tetrahydrofuran; diethyl ether 2 h; Product distribution / selectivity;

(i) nBuLi, hexane, THF, (ii) /BRN= 471286/; Multistep reaction;