T. Fujiwara et al., Preparation of (Z)-alk-2-ene-1,5-diols by the titanocene(II)-promoted cyclization of thioacetals possessing a terminal carbon-carbon double bond, EUR J ORG C, (1), 2001, pp. 155-161
Titanocene(II)-promoted ring-closing metathesis of the titanium carbene com
plexes prepared from [ 2,2 -bis(phenylthio)ethyl](but-3-enyloxy)dimethylsil
anes or dimethyl(prop-2-enyl)silyl ethers of 3,3-bis(phenythio) propanols g
ave seven- membered cyclic unsaturated silyl ethers. Oxidative cleavage of
a silicon-carbon bond of the cyclic silyl ethers resulted in olefinic diols
, with high Z stereoselectivity.