METHOD FOR THE PRODUCTION OF 4,4'-[1-TRIFLUOROMETHYL)ALKYLIDENE]-BIS-(2,6-DIPHENYLPHENOLS)
申请人:Gralla Gabriele
公开号:US20100312020A1
公开(公告)日:2010-12-09
The present invention relates to a process for preparing 4,4′-[1-(trifluoromethyl)alkylidene]bis(2,6-diphenylphenols), in particular for preparing 4,4′-[1-(trifluoromethyl)ethylidene]bis(2,6-diphenylphenol), which comprises the self-condensation of cyclohexanone in the presence of a basic catalyst to form tricyclic condensation products, dehydrogenation of the resulting tricyclic condensation products in the presence of a supported transition metal catalyst in the condensed phase to form 2,6-diphenylphenol and reaction of the 2,6-diphenylphenol with a trifluoromethyl ketone. The invention further provides an improved process for preparing 2,6-diphenylphenol by aldol self-condensation of cyclohexanone.
本发明涉及一种制备4,4'-[1-(三氟甲基)烷基亚甲基]二(2,6-二苯基酚)的方法,特别是制备4,4'-[1-(三氟甲基)乙基亚甲基]二(2,6-二苯基酚)的方法,包括在碱性催化剂存在下环己酮的自缩合反应,形成三环缩合产物,然后在支持的过渡金属催化剂存在下,在凝聚相中脱氢,形成2,6-二苯基酚,最后将2,6-二苯基酚与三氟甲基酮反应。本发明还提供了一种改进的通过环己酮的自缩合反应制备2,6-二苯基酚的方法。