2
024
M. A. Zolfigol et al.
was stirred at room temperature for 30 min (the progress of the reaction
was monitored by TLC) and then filtered. Anhydrous Na2SO4 (3 g) was
added to the filtrate. After 15 min the resulting mixture was filtered.
◦
Dichloromethane was removed by water bath (35–40 C) and simple
distillation. The yield was, 0.232 g, (67%) of a crystalline pale yellow
◦
5c
◦
1
solid (6b), m.p. 89–90 C [lit. m.p. 91 C]. H-NMR (FT-90 MHz, CDCl3,
1
TMS): δ 7.12 (dd, 1H), 7.42 (dd, 1H), 8.02 (s, 1H), 10.31 (b, 1H). H-NMR
spectra were identical with reference spectra.
5
c
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