Limitations on the Persistence of Iminoxyls: Isolation of <i>tert</i>-Butyl 1,1-Diethylpropyl Ketiminoxyl and Related Radicals
作者:Brian M. Eisenhauer、Minghui Wang、Henryk Labaziewicz、Maria Ngo、G. David Mendenhall
DOI:10.1021/jo962136e
日期:1997.4.1
Me(2)CH(C=NOH)C(5)H(11)-t (7H), among others, did not lead to isolable iminoxyls. A new, convenientsynthesis of symmetrical tertiary imines from tert-RCl, tert-RCN, and Na is described. Radical t-Bu(2)C=NO(*) (8) and cyclohexene readily gave the allylic substitution product, 2,2,4,4-tetramethyl-3-hexanone O-(2'-cyclohexen-1'-yl)oxime.
Hydroformylation of olefinic compounds in the presence of soluble cobalt salt catalysts and an organic nitrile promoter
申请人:HENKEL CORPORATION
(a Delaware corp.)
公开号:EP0208921A2
公开(公告)日:1987-01-21
A process is provided for the hydroformylation of an olefinic compound with carbon monoxide and hydrogen in the presence of cobalt catalyst and a promoter comprised of an organic nitrile. In one aspect, the olefinic compounds are olefinic fatty compounds with at least 4 carbon atoms. In another aspect, the cobalt catalyst consists of only a soluble cobalt salt and a promoter consisting of an organic nitrile such as acetonitrile. in another aspect of the invention, the olefinic compound to be hydroformylated contains a cyano substituent such that the reaction is self promoted.
A compound of formula (I) or a salt thereof is useful as an intermediate for producing antifungal imidazolone or imidazolidinone with advantages from the industrial point of view.
wherein Ar is a phenyl group which may be substituted; R1 is a hydrogen atom or lower alkyl; R2 is an aliphatic or aromatic hydrocarbon group which may be substituted or an aromatic heterocyclic group which may be substituted; R3 is a group of the formula -CH2Y (wherein Y is a hydroxyl group or a halogen atom) or a formyl group which may be protected.
式(I)化合物或其盐可作为生产抗真菌咪唑啉酮或咪唑啉酮的中间体,具有工业优势。
其中 Ar 为可被取代的苯基;R1 为氢原子或低级烷基;R2 为可被取代的脂肪族或芳香族烃基或可被取代的芳香族杂环基;R3 为式 -CH2Y 的基团(其中 Y 为羟基或卤原子)或可被保护的甲酰基。