Scheme. 1.
Chemical synthesis of BMB. (a) N-bromosuccinimide, (PhCO)2O2, reflux, 44%. (b) P(OEt)3, reflux, 56%. (c) NaH, 4-nitrobenzaldehyde, 70°C to reflux, 54%. (d) SnCl2, EtOH, reflux, 80%.
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