Sodium Carbonate → HCID 70267344, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of diphenylamino-9,9-diethyl-bromofluorene (7.02g, 0.015 mol), benzothiazole boronic acid (7.5 g 0.029 mol.), ethanol (50 ml), in NMP (50 ml) was degassed by bubbling nitrogen through the solution for 20 min. Sodium carbonate (13.0 g, 0.12 mol.) and 5% palladium on charcoal (1.5 g ) were then added, the mixture heated at 85-90° C. for 42 hrs. The resulting solids (18.0 g) that separated upon cooling were collected, washed with ethanol and dried. The solids were then transferred to a chromatograph column containing 300 g of alumina. Elution with 1:1 toluene-heptane gave the product, 4.98 g. (55.5% yield), m.p. 243.6-246.1° C. Recrystallization from toluene did not raise the melting point. Mass Spec: m/z 598, (M+). Analysis calculated for C42H34N2S: C, 84.25; H, 5.72; N, 4.68; S, 5.34. Found: C, 83.87; H, 6.02; N, 5.04; S, 5.29.

Provenance & Evidence