申请人:Bayer Aktiengesellschaft
公开号:US04014889A1
公开(公告)日:1977-03-29
Ketones are prepared by reacting an aromatic or heterocyclic aldehyde in the presence of a cyanide ion with an unsaturated compound having the formula (I): ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are the same or different and are selected from the group of hydrogen, optionally substituted aliphatic, cycloaliphatic, araliphatic, aromatic, heterocyclic and carboxylic acid ester and R.sup.4 is nitrile (CN), --CO--R.sup.5 or --CO--OR.sup.5 wherein R.sup.5 is selected from the group of optionally substituted aliphatic, cycloaliphatic, araliphatic, aromatic and heterocyclic and R.sup.1 and R.sup.2 and/or R.sup.1 and R.sup.3 and/or R.sup.2 and R.sup.5 or R.sup.3 and R.sup.5 together with the carbon atoms to which they are attached as substituents may also form a carbocyclic or heterocyclic ring. Ketones prepared according to the process of the invention have the formula: ##STR2## wherein R.sup.1 .sup.' and R.sup.3 .sup.' are identical or different and are selected from the group of hydrogen, lower alkyl having up to 3 C-atoms and optionally substituted phenyl; and R.sup.6 .sup.' is optionally substituted phenyl or a pyridyl.
酮类化合物是通过在氰离子存在下将芳香族或杂环醛与具有以下式(I)的不饱和化合物反应制备的:##STR1##其中R.sup.1、R.sup.2和R.sup.3相同或不同,选自氢、可选择取代的脂肪族、环脂肪族、芳基脂肪族、芳香族、杂环和羧酸酯,R.sup.4是腈(CN)、--CO--R.sup.5或--CO--OR.sup.5,其中R.sup.5选自可选择取代的脂肪族、环脂肪族、芳基脂肪族、芳香族和杂环,而R.sup.1和R.sup.2和/或R.sup.1和R.sup.3和/或R.sup.2和R.sup.5或R.sup.3和R.sup.5连同它们附着的碳原子也可以形成碳环或杂环。根据本发明的方法制备的酮类化合物具有以下式:##STR2##其中R.sup.1'.和R.sup.3'.相同或不同,选自氢、具有最多3个碳原子的低烷基和可选择取代的苯基;R.sup.6'.是可选择取代的苯基或吡啶基。