反应详情

To a solution of 4-chloro-3-isobutyryloxy-10H-phenothiazine (see Example 8) (202 mg) in DMF (5 ml) was added methyl iodide (0.2 ml) and sodium hydride (18 mg) at 0° C. The reaction mixture was stirred at ambient temperature for 12 hours. To the reaction mixture was added water and the resulting aqueous layer extracted with EtOAc. The organic layers were collected, dried and evaporated to give a residue which was purified by chromatography on silica gel (plates) to give 100 mg of 4-chloro-3-isobutyryloxy-10-methyl-10H-phenothiazine (m.p. 147° C.).

1. extractionthe resulting aqueous layer extracted with EtOAc
2. customThe organic layers were collected
3. customdried
4. customevaporated
5. customto give a residue which
6. customwas purified by chromatography on silica gel (plates)