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BIBTEX RIS

Carbonyl Olefination by Means of a gem -Dichloride−Cp 2 Ti[P(OEt) 3 ] 2 System

1998; American Chemical Society; Volume: 63; Issue: 21 Linguagem: Inglês

10.1021/jo980724h

ISSN

1520-6904

Autores

Takeshi Takeda, Rika Sasaki, Tooru Fujiwara,

Tópico(s)

Advanced Synthetic Organic Chemistry

Resumo

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.

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