HCID 178432061, compound → HCID 178432060, compound

Participants

Reaction Steps

5-tert-Butyldirnethylsilyloxy-2-methyl-6,7,8,9-tetrahydro-5H-cyclohepta[b]pyridine-3-carbonylguanidine (252.5 mg, 0.37 mmol) was dissolved in 5% hydrochloric acid methanol solution (10.1 ml) at 0° C. and stirred at room temperature for 14 hours. The solvent was evaporated under reduced pressure, and the thus obtained residue was mixed with chloroform:methanol (4:1), adjusted to pH 9 to 10 with 5% sodium hydroxide aqueous solution and then extracted with chloroform:methanol (4:1). The thus obtained organic layer was washed with water and saturated brine in that order and dried over anhydrous sodium sulfate. The solvent was evaporated under reduced pressure, and the resulting residue was crystallized from chloroform-ether to obtain the title compound (131.0 mg, 74.9%) as white powder.

Provenance & Evidence