Dichloromethane → HCID 86640053, compound

Participants

Reaction Steps

Combine dichloromethane (15 ml) and (R)-[7-cyano-1,2,3,4-tetrahydro-cyclopenta[b]indol-2-yl]-carbamic acid tert-butyl ester (2 g, 6.73 mmol) and stir for 10 min under nitrogen at room temperature. Add diisobutylaluminum hydride (1 M solution in methylene chloride, 14.1 ml; 14.1 mmol) dropwise over 15 min. Add ethyl acetate (30 mL) to the reaction mixture and stir at room temperature for 1 h. Add a 20% aqueous solution of sodium tartrate (30 mL) and stir for 1 h at room temperature. Separate the organic layer and extract the aqueous layer with ethyl acetate (2×15 mL). Combine and dry (Na2SO4) organic layers, filter and concentrate to give 2.2 g [(R)-7-formyl-1,2,3,4-tetrahydro-cyclopenta[b]indol-2-yl]-carbamic acid tert-butyl ester. Purify by chromatography on silica gel using methylene chloride/acetone (95/5) to give 1.3 g (64%). MS (m/z): 301 (M+1).

Provenance & Evidence