Sodium Hydroxide → HCID 19896786, compound

Participants

Reaction Steps

2 g. (6.5 mmole) 8,8-dimethyl-2-(4-hydroxyphenyl)-5,6,7,8-tetrahydro-lH-imidazo[4,5-g]quinolin-6-one (see Example 30 d)) were suspended in 10 ml. water and, while cooling with ice, 5 ml. (65 mmole) methanesulphonic acid chloride and 50 ml. 2N aqueous sodium hydroxide solution were alternatingly added dropwise thereto in such a manner that a pH value of about 10 to 13 was always present. When the reaction was completed, the reaction mixture was filtered off with suction, the product was washed with water and purified by column chromatography (elution agent: methylene chloride/ methanol/acetic acid; 10:1:0.2 v/v/v). The evaporation fractions were suspended in water, rendered ammoniacal and washed with water to give 1.5 g. (68% of theory) of the title compound; m.p. 209 -215° C.

Provenance & Evidence