Benzyl chloroformate → 1-Benzyl 6-(tert-butyl) 1,6-diazaspiro[3.5]nonane-1,6-dicarboxylate

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Reaction Steps

A solution of benzyl chloroformate (0.148 mL, 1.039 mmol) in DCM (1 mL) was added to a mixture of tert-butyl-1,6-diazaspiro[3.5]nonane-6-carboxylate (200 mg, 0.866 mmol) and DIPEA (0.378 mL, 2.165 mmol) in DCM (3 mL) and the mixture was stirred at RT for 16 h. The solvent was evaporated off under reduced pressure and the crude product was purified by flash chromatography (Silica gel column, 4 g, n-hexane/DCM from 20% to 100% DCM) to give the title product as a yellow resin. UPLC-MS (Condition 3) tR=1.21 min, m/z=361.1 [M+H]+.

Provenance & Evidence