Aluminium lithium hydride → (RS,SR)-2-(1-benzenesulfonyl-2-hydroxy-1-methyl-ethyl)-7-chloro-2,3-dihydro-1H-cyclopenta[b]indole-4-carboxylic acid tert-butyl ester

Participants

Reaction Steps

152 mg (0.29 mmol) (RS,SR)-2-(1-benzenesulfonyl-1-methoxycarbonyl-ethyl)-7-chloro-2,3-dihydro-1H-cyclopenta[b]indole-4-carboxylic acid tert-butyl ester were dissolved in 3 mL dry THF at RT. 0.32 mL (0.32 mmol, 1.1 eq) of LiAlH4 (1M in THF) were added dropwise. The reaction mixture was stirred for 1 hour and 40 minutes. The reaction was quenched with a saturated NaHCO3 solution. The organic phase was washed with brine, dried over Na2SO4, filtered and evaporated. Column chromatography on silica gel (EtOAc/heptane 1:2) yielded 50 mg (35%) (RS,SR)-2-(1-benzenesulfonyl-2-hydroxy-1-methyl-ethyl)-7-chloro-2,3-dihydro-1H-cyclopenta[b]indole-4-carboxylic acid tert-butyl ester as a white powder.

Provenance & Evidence