Methyl thieno [2,3-f] [l, 3] benzodioxole-6-carboxylate
Starting from 3.0 g (13.1 mmol) 6-Brompiperonal with 0.79 g (19.7 mmol) of sodium hydride (60% strength) and 1.53 g (14.4 mmol) mercaptoacetate 732 mg (18.5% o of theory) of the title compound.
1H NMR (200 MHz, DMSO-d 6):
δ = 8.03 (s, IH),
7.62 (s, IH),
7.48 (s, IH),
6.14 (s, 2H),
3.86 (s, 3H) ppm
.
HPLC: R t = 4.6 min (Method H)
