Titanocene(II)-promoted desulfurizative tertiary alkylation of 1,3-bis(phenylthio)alk-1-enes and β,γ-unsaturated thioacetals

Add time:08/17/2019    Source:sciencedirect.com

The desulfurization of 1,3-bis(phenylthio)alk-1-enes with the low valent titanium species Cp2Ti[P(OEt)3]2 and subsequent reaction with tert-alkyl chlorides gave the terminal olefins regioselectively. The similar reactions also took place when β,γ-unsaturated thioacetals were treated successively with the titanocene(II) species and tert-alkyl chlorides. It was suggested that the present reactions proceeded via the formation of (E)-vinyltitanium intermediate.

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