反应详情

The title compound was prepared from 2,3-dihydrothiazolo[3,2-a]indole-9carboxylic acid (D15) using the method of Example 10. The crude product was purified by chromatography on silica gel eluting with 5% methanol/chloroform to give a yellow oil. This was passed through a plug of basic alumina eluting with ethyl acetate to afford the title compound as a pale yellow oil (31%) which was converted to its oxalate salt and was crystallised from acetone as an off-white solid mp 212°-215° C.

1. customThe crude product was purified by chromatography on silica gel eluting with 5% methanol/chloroform
2. customto give a yellow oil