Chlorotriethylsilane → 1-benzyl-5-(2,2,2-trifluoro-1-triethylsilanyloxy-1-trifluoromethyl-ethyl)-1H-indole-2-carbaldehyde

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Reaction Steps

To a solution of 0.33 g (0.82 mmol) of 1-benzyl-5-(2,2,2-trifluoro-1-hydroxy-1-trifluoromethyl-ethyl)-1H-indole-2-carbaldehyde (example 23) in 3 mL of DMF at 0° C. were added 0.15 mL (0.99 mmol) of DBU, followed by 0.17 mL (0.99 mmol) of TESCl. The mixture was stirred at RT overnight and then poured into a mixture of a saturated aqueous solution of NH4Cl and Et2O. The phases were separated and the aqueous one was extracted with Et2O. The combined organic phases were dried over Na2SO4 and evaporated to yield 0.389 g (92%) of 1-benzyl-5-(2,2,2-trifluoro-1-triethylsilanyloxy-1-trifluoromethyl-ethyl)-1H-indole-2-carbaldehyde, MS: 516 (MH+).

Provenance & Evidence