Di-tert-butyl azodicarboxylate → HCID 86648901, compound

Participants

Reaction Conditions

Reaction Steps

5-Bromo-2,2-dimethyl-indan 45b (2.4 g, 10.7 mmol) was dissolved in 20 mL of dry tetrahydrofuran. Upon cooling by a dry ice-ethanol bath to −78° C., n-butyllithium (12.1 mL, 30.2 mmol) was added dropwise. Upon completion of the addition, the mixture was stirred for 2 hours. A solution of di-tert-butyl azodicarboxylate (3.27 g, 14.2 mmol) in 20 mL of dry tetrahydrofuran was added to the above mixture. The reaction mixture was reacted at the same temperature for 3 hours. The reaction was monitored by TLC until the disappearance of the starting materials and quenched by addition of 50 mL of water. The mixture was extracted with ethyl acetate (50 mL×2). The combined organic extracts were washed with saturated brine, dried over anhydrous sodium sulfate, filtered to remove the drying agent and concentrated under reduced pressure. The residue was purified by silica gel column chromatography to obtain the title compound di-tert-butyl 1-(2,2-dimethyl-inden-5-yl)hydrazine-1,2-dicarboxylate 45c (2.68 g, yield 66.8%) as a yellow oil.

Provenance & Evidence