ALKALINE HYDROLYSIS OF δ-SUBSTITUTED β,γ-UNSATURATED THIOLOPHOSPHATES
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Pogosyan, A. S.,Torgomyan A. M.,Indzhikyan, M. G.
p. 1383 - 1387
(2007/10/02)
The Stabilization due to the Methyl Group in RSCH2CH=CHCH3
Equilibrium constants for the isomerization reactions have been measured and the energy differences of the isomers have been calculated.According to these results a methyl group stabilizes the double bond by 12.8(5) kJ mol-1 and the RSCH2CH3 cis interaction is 3.7(4) kJ mol-1.
Kimmelma, Reijo
p. 344 - 347
(2007/10/02)
Selective Condensation of titanium Reagent with Carbonyl Compounds
titanium reagent generated easily from allyl ethyl sulfides condensed with aldehydes to give erythro-β-hydroxy sulfides in highly regio- and stereoselective manner.In contrast, crotyl ethyl sulfide reacted with aldehydes affording δ-hydroxy vinyl sulfide exclusively.The substitution pattern of the starting sulfide can have a pronounced effect on the selectivity in this condensation reaction, erythro-β-Hydroxy sulfide obtained was transfromed stereoselectively to the trans-vinyloxirane or 1,3-alkadiene.