Imidazole → 4-Chloro-1-(cyclopropylmethyl)-5-[4-(iodomethyl)cyclohex-1-en-1-yl]-1H-benzotriazole

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Reaction Steps

To a tetrahydrofuran solution (2 mL) of triphenylphosphine (94 mg, 0.36 mmol, 1.1 equiv) was added imidazole (0.11 g, 1.6 mmol, 5 equiv) and iodine (86 mg, 0.34 mmol, 1.05 equiv). After stirring for 10 minutes, a tetrahydrofuran solution (1.5 mL) of {4-[4-chloro-1-(cyclopropylmethyl)-1H-benzotriazol-5-yl]cyclohex-3-en-1-yl}methanol (Example 2, 0.10 g, 0.32 mmol) was added and the mixture was stirred for 1 hour. In a separate flask, a tetrahydrofuran solution (2 mL) was prepared containing triphenylphosphine (94 mg, 0.36 mmol, 1.1 equiv), imidazole (0.11 g, 1.6 mmol, 5 equiv) and iodine (86 mg, 0.34 mmol, 1.05 equiv), which was added to the reaction mixture after stirring for 10 minutes. After stirring for an additional 1 hour, an additional tetrahydrofuran solution (2 mL) containing triphenylphosphine (94 mg, 0.36 mmol, 1.1 equiv), imidazole (0.11 g, 1.6 mmol, 5 equiv) and iodine (86 mg, 0.34 mmol, 1.05 equiv) was added to the reaction mixture. After stirring for an additional 30 minutes, the mixture was purified by silica gel gradient chromatography (100:0 to 0:100; hexanes:ethly acetate), providing the titled compound as a light yellow oil.

Provenance & Evidence