Carbonyl Olefination by Means of a gem-Dichloride-Cp(2)Ti[P(OEt)(3)](2) System.
Carbonyl Olefination by Means of a gem-Dichloride-Cp(2)Ti[P(OEt)(3)](2) System.
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通过偕二氯化物-Cp(2)Ti[P(OEt)(3)](2) 系统进行羰基烯化。
DOI：
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发表时间：
1998
影响因子：
3.6
通讯作者：
T. Fujiwara
中科院分区：
文献类型：
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作者：
T. Takeda*;R. Sasaki;T. Fujiwara
研究了偕二氯-Cp（2）Ti[P（OEt）（3）]（2）体系羰基烯化制备高取代烯烃的反应。处理的有机钛物种，通过与二茂钛（II）物种的反应，从宝石-二氯化物具有两个烷基取代基，与醛或酮提供三-或四取代的烯烃在良好的产率。无环或环状三取代乙烯基醚也通过使用羧酸酯或内酯作为羰基组分的类似反应获得。
The preparation of highly substituted olefins by carbonyl olefination using a gem-dichloride-Cp(2)Ti[P(OEt)(3)](2) system was studied. The treatment of organotitanium species, formed by reaction with titanocene(II) species from gem-dichlorides having two alkyl substituents, with an aldehyde or ketone afforded tri- or tetrasubstituted olefins in good yields. Acyclic or cyclic trisubstituted vinyl ethers were also obtained by a similar reaction using carboxylic esters or lactones as carbonyl components.