Shinichi Tada

A new synthesis of 1,3-dienes from allyl sulfides and allyl sulfones using tri-n-butylstannylmethyl iodide

Allyl 2-pyridyl sulfide 6 or allyl phenyl sulfone 7 on treatment with n-butyllithium in tetrahyrofuran followed by tri-n-butylstannylmethyl iodide (4) afforded directly the 1,3-diene 8 in good yield.

Silicon-directed elimination from β-trimethylsilyl sulphoxides and the regiospecific synthesis of olefins

The regiospecific formation of olefins by the thermal elimination of sulphenic acid from β-trimethylsilyl sulphoxides followed by protodesilylation is reported and the effect of the trimethylsilyl group on the thermal elimination is discussed.

Spectroscopic evidence for the formation of catecholato-FeIII and semiquinonato-FeII pyridine complexes in the oxygenation of catechol by a pyridineiron(III) complex

300 MHz 1H N.m.r. and Mossbauer spectra of the solutions preapred by mixing catechol and iron(III) chloride in pyridine indicated clearly the formation of catecholato-FeIII and semiquinonato-FeII pyridine complexes in equilibrium, suggesting the probability of oxygenation of catechol via the latter.