反应详情

N-Chloroacetyl-α-hydroxyglycine (6.5 g., 0.038 mole) was added to a cold, stirred mixture of concentrated sulphuric acid (1.5 ml.) and glacial acetic acid (15 ml.) followed, after five minutes, by the dropwise addition of 2,3-dihydrobenzo(b)thiophen (98%, 4.1 g., 0.03 mole). The reaction mixture was stirred at ambient temperature for five hours, then water (75 ml.) was added to the resulting suspension and the mixture thoroughly stirred. Filtration gave a solid which was washed successively with water, diethyl ether and hexane, then dried, to afford DL-α-chloroacetamido-2,3-dihydro-5-benzo(b)thienylacetic acid (5.6 g.), m.p. 173°-175° C.

1. stirringThe reaction mixture was stirred at ambient temperature for five hours
2. stirringthe mixture thoroughly stirred
3. filtrationFiltration
4. customgave a solid which
5. washwas washed successively with water, diethyl ether and hexane
6. customdried