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Carbonyl Olefination Utilizing a Thioacetal-Titanocene II System

Alkylidenation of Aldehydes, Ketones, and Carboxylic Acid Derivatives [Pg.179]

The carbene complexes thus prepared can be employed for the olefination of a variety of carbonyl compounds. The procedure is operationally simple treatment of the thioacetals with titanocene(II) species at ambient temperature for 5-15 min affords the organotitanium species, which are further treated with ketones and aldehydes in the same reaction vessel to give the olefins or dienes (Table 4.12) [96]. [Pg.179]

Methylenation also proceeds using bis(phenylthio)methane, although the yields of terminal olefins are lower than those obtained by other titanium-based methylenation procedures. [Pg.180]

Alkylidenation with a thioacetal-titanocene(II) system is useful for the conversion of carboxylic acid derivatives into enol ethers, alkenyl sulfides, and enamines. As with other titanium-based reagents, mixtures of stereoisomers are formed in [Pg.180]


See other pages where Carbonyl Olefination Utilizing a Thioacetal-Titanocene II System is mentioned: [Pg.184]   


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A Olefins

A-Thioacetal

Carbonyl olefination

Carbonyl systems

Carbonylation systems

Olefinic systems

Olefins carbonylation

Olefins systems

Thioacetal

Thioacetal-titanocene

Thioacetal-titanocene system

Thioacetalization

Thioacetate

Thioacetates

Titanocene

Titanocene system

Titanocenes

Utility systems

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