Darstellung von 1,1-Diphenylethanole durch Addition von Organotitan-Verbindungen an substituierte Aceto- und Benzophenone
作者:Vladimir Dimitrov、Stephan Stanchev、Branimir Milenkov、Teo Nikiforov、Plamen Demirev
DOI:10.1055/s-1991-26429
日期:——
Preparation of 1,1-Diphenylethanols by Addition of Organotitanium Compounds to Substituted Aceto- and Benzophenones The 1,1-diphenylethanols 5a-h were prepared by the addition of phenyltitanium triisopropoxide (3) to 4-substituted acetophenones 1a-h. The titanium tetraalkoxide 7, formed in situ from 3 and 1a, forms complexes with up to two molecules of 1a, this was established by 13C-NMR. Preparation of the alcohols 5a-f was also carried out by the reaction of methyltitanium triisopropoxide (4) with 4-substituted benzophenones 2a-f.
通过将有机钛化合物加成到取代的乙酰苯和二苯甲酮来制备1,1-二苯基乙醇通过将三异丙醇苯基钛(3)加成到4-取代的苯乙酮1a-h来制备1,1-二苯基乙醇5a-h。由3和1a原位形成的四烷氧基钛7与最多两个1a分子形成络合物,这是通过13C-NMR确定的。醇5a-f的制备也通过三异丙醇甲基钛(4)与4-取代的二苯甲酮2a-f的反应进行。