Phenol → Phenol, 4,4'-[1,3-phenylenebis(1-methylethylidene)]bis-

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A 500-ml three-neck reactor was charged with amberlist-15 (7.5 g, 2.6 mmols), phenol (178.5 g, 633 mmols) and toluene (30 ml). The contents were heated up to 80° C. in nitrogen atmosphere. Under agitation, a mixture of m-diisopropenylbenzene (m-DIPeB, 15.0 g, 31.5 mmols) and toluene (30 ml) was fed thereto over 3 hours at 80° C. After completion of the feed, agitation was carried out at 80° C. for 10 minutes and then Amberlist-15 was removed by filtration. The filtrate was analyzed by liquid matography. Bisphenol M (α, α″-bis(4-hydroxyphenyl)-1,2-diisopropylbenzene, 28.8 g, yield 88%), the intended product, and the o,p-product, the position isomer of bisphenol M (α-(4-hydroxyphenyl)-α″-(2-hydroxyphenyl)-1,3-diisopropylbenzene, 2.79 g, yield 8.5%), were obtained. After completion of the same aftertreatment and purification operations as those in Example 3, bisphenol M was isolated (17.7 g., isolation yield 54%, purity 99.6%).

Herkunft & Nachweise