Lithium diisopropylamide → 2-(2-bicyclo[2.2.1]heptanylamino)-5-[2-[tert-butyl(dimethyl)silyl]oxyethyl]-1,3-thiazol-4-one

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The title compound was prepared according to the procedure described in the preparation of tert-butyl 4-((2-((2S)-bicyclo[2.2.1]heptan-2-ylamino)-5-methyl-4-oxo-4,5-dihydrothiazol-5-yl)methyl)piperidine-1-carboxylate by using 2-(bicyclo[2.2.1]heptan-2-ylamino)thiazol-4(5H)-one (1.00 g, 4.76 mmol), lithium diisopropylamide (Aldrich, 2.0 M in heptane/THF/ethylbenzene, 8.5 mL, 19.0 mmol), and (2-bromoethoxy)(tert-butyl)dimethylsilane (Aldrich, 6.83 g, 28.5 mmol). The title compound was obtained as an off-white solid (950 mg). MS (ESI, pos. ion) m/z: 369 (M+H).

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