(2-Bromoethoxy)-tert-butyldimethylsilane → Ethyl 5-(3-(4-(tert-butoxycarbonylamino)benzyl)-2-oxoimidazolidin-1-yl)-3-methylthiophene-2-carboxylate

Participants

Reaction Steps

Following the procedure as described in Example 50, making variations as required to replace (2-bromoethoxy)(tert-butyl)dimethylsilane with tert-butyl 4-(chloromethyl)phenylcarbamate to react with ethyl 3-methyl-5-(2-oxoimidazolidin-1-yl)thiophene-2-carboxylate, the title compound was obtained as an off-white solid in 80% yield: 1H NMR (300 MHz, CDCl3) δ 7.34 (d, J=8.2 Hz, 2H), 7.22 (d, J=8.2 Hz, 2H), 6.49 (br s, 1H), 6.14 (s, 1H), 4.41 (s, 2H), 4.27 (q, J=7.1 Hz, 2H), 3.81-3.73 (m, 2H), 3.45-3.37 (m, 2H), 2.49 (s, 3H), 1.51 (s, 9H), 1.34 (t, J=7.1 Hz, 3H); MS (ES+) m/z 482.5 (M+23).

Provenance & Evidence