1-Methylimidazole → Ethyl 2-methyl-2-[4-(trifluoromethyl)phenyl]cyclopropanecarboxylate

Participants

Reaction Steps

To a toluene (50 ml) solution of 1-isopropenyl-4-(trifluoromethyl)benzene (4.93 g, 26.5 mmol) [Tetrahedron (2003), 59(17), 2999-3002], Co(TPP) (534 g, 0.795 mmol) and 1-methyl-1H-imidazole (6.53 g, 79.5 mmol), ethyl diazoacetate (4.23 g, 37.0 mmol) was added. Then the reaction and the following work-up were carried out accridong to the procedure described in Example 2H. The crude residue was applied to a silica gel chromatography column and eluted with a volume mixture of hexane and EtOAc (20/1) to afford 5.92 g (82% yield, trans) of the title compound as a colorless oil.

Provenance & Evidence