Bromodiphenylmethane → HCID 19026043, compound

Participants

Reaction Steps

560.5 g (1.0 mol) of 3,9-bis(diphenylmethoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5,5]undecane and 494.3 g (2.0 mol) of diphenylmethyl bromide were charged into a reactor equipped with a stirrer, thermometer and capacitor, and dry nitrogen was caused to flow into the reactor under agitation at room temperature. Thereafter, heating was started with an oil bath which was kept at 150° C. for 15 minutes. The oil bath was removed to cool the reactor to room temperature. 2,000 ml of acetone was added to the obtained reaction product which was a white solid and stirred to clean the reaction product, and the white powder was separated by filtration with a glass filter. Then, the separated white powder was cleaned with 2,000 ml of a 50 wt % aqueous solution of methanol and dried at 100 Pa and 120° C. for 8 hours to produce 398.0 g of 2,4,8,10-tetraoxa-3,9-diphosphaspiro[5,5]undecane, 3,9-bis(diphenylmethyl)-3,9-dioxide. It was confirmed from mass spectral analysis, 1H, 31P nuclear magnetic resonance spectral analysis and elemental analysis that the product was 2,4,8,10-tetraoxa-3,9-diphosphaspiro[5,5]undecane, 3,9-bis(diphenylmethyl)-3,9-dioxide. This compound had a yield of 71%, an HPLC purity of 99.1% and an acid value of 0.39 mgKOH/g.

Provenance & Evidence