Ethyl 4-Bromo-1H-pyrrole-2-carboxylate, 4
433267-55-1;
ethyl ester 4 (181.9 g, 92% yield) as a semicrystalline to amorphous solid (mp 60–63 °C):
1H NMR (400 MHz, DMSO-d6) δ 12.25 (br s, 1H), 7.15 (s, 1H), 6.79 (s, 1H), 4.23 (q,J = 7.1 Hz, 2H), 1.26 (t, J = 7.1 Hz, 3H);
13C NMR (100 MHz, DMSO-d6) δ 159.5, 123.7, 122.8, 115.9, 95.8, 59.9, 14.2;
HRMS-ESI (m/z) calcd for C7H7BrNO2 [M – H]− 215.9660 and 217.9640, found 215.9647 and 217.9621
1H NMR (400 MHz, DMSO-d6) δ 12.25 (br s, 1H), 7.15 (s, 1H), 6.79 (s, 1H), 4.23 (q,J = 7.1 Hz, 2H), 1.26 (t, J = 7.1 Hz, 3H);
13C NMR (100 MHz, DMSO-d6) δ 159.5, 123.7, 122.8, 115.9, 95.8, 59.9, 14.2;
HRMS-ESI (m/z) calcd for C7H7BrNO2 [M – H]− 215.9660 and 217.9640, found 215.9647 and 217.9621
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CCOC(=O)C1=CC(=CN1)Br
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