[EN] PROCESS FOR PRODUCING TRIFLUOROMETHYL-SUBSTITUTED 2-ALKOXYACETOPHENONE DERIVATIVES<br/>[FR] PROCEDE DE PRODUCTION DE DERIVES DE 2-ALCOXYACETOPHENONE TRIFLUOROMETHYLE-SUBSTITUEE
申请人:CENTRAL GLASS CO LTD
公开号:WO2004014887A1
公开(公告)日:2004-02-19
A process for producing a brominated acetal (represented by the formula 3) includes (a) brominating a trifluoromethyl-substituted acetophenone by Br2 in the presence of an alkylene diol. It is optional to produce a trifluoromethyl-substituted 2-alkoxyacetophenone derivative (represented by the formula 9) by (b) reacting the brominated acetal with a metal alkoxide, thereby converting the brominated acetal into an ether; and (c) hydrolyzing the ether in the presence of an acid catalyst to remove an acetal group from the ether, thereby producing the 2-alkoxyacetophenone derivative. Alternatively, the 2-alkoxyacetophenone can be produced by (a) reacting a trifluoromethyl-substituted phenacyl halide with an acetalization agent, thereby converting the phenacyl halide into an acetal; (b) reacting the acetal with a metal alkoxide, thereby converting the acetal into an ether; and (c) hydrolyzing the ether in the presence of an acid catalyst to remove the acetal group from the ether.
Process for producing trifluoromethyl- substituted 2- alkoxyacetophenone derivatives
申请人:Ishii Akihiro
公开号:US20050171363A1
公开(公告)日:2005-08-04
A process for producing a brominated acetal (represented by the formula 3) includes (a) brominating a trifluoromethyl-substituted acetophenone by Br
2
in the presence of an alkylene diol. It is optional to produce a trifluoromethyl-substituted 2-alkoxyacetophenone derivative (represented by the formula 9) by (b) reacting the brominated acetal with a metal alkoxide, thereby converting the brominated acetal into an ether; and (c) hydrolyzing the ether in the presence of an acid catalyst to remove an acetal group from the ether, thereby producing the 2-alkoxyacetophenone derivative. Alternatively, the 2-alkoxyacetophenone can be produced by (a) reacting a trifluoromethyl-substituted phenacyl halide with an acetalization agent, thereby converting the phenacyl halide into an acetal; (b) reacting the acetal with a metal alkoxide, thereby converting the acetal into an ether; and (c) hydrolyzing the ether in the presence of an acid catalyst to remove the acetal group from the ether.
DIMETHYL SQUARATE AND ITS CONVERSION TO 3-ETHENYL-4-METHOXYCYCLOBUTENE-1,2-DIONE AND 2-BUTYL-6-ETHENYL-5-METHOXY-1,4-BENZOQUINONE
作者:Liu, Hui、Tomooka, Craig S.、Xu, Simon L.、Yerxa, Benjamin R.、Sullivan, Robert W.、Xiong, Yifeng、Moore, Harold W.、Manabe, Shino、Koga, Kenji
DOI:10.15227/orgsyn.076.0189
日期:——
Methylene derivatives as intermediate in polar reaction. XXVII. Formation of tri-tert-butyl orthoformate and tert-butyl di-tert-butoxyacetate in the reactions of chlorodifluoromethane and dichlorofluoromethane with potassium tert-butoxide