The invention describes a process for stabilizing an organic material against oxidative, thermal or light-induced degradation, which comprises incorporating therein or applying thereto at least a compound of the formula (I) wherein the general symbols are as defined in claim
1
. The compounds of the formula I are especially useful as processing stabilizers for synthetic polymers.
Simple treatment of aldehydes with the carbonylcompounds (1)[R2COCH2S(O)nAr; n= 0,1,2] and piperidine stereoselectively produces the condensation products (7), the stereochemistry of which is controlled by the steric requirements of two functional groups COR2 and S(O)nAr in a sulphur-stabilized carbanion intermediate.
Preparation and rearrangement of some conjugated phenylsulphinylacetate derivatives
作者:Quezia B. Cass、Albert A. Jaxa-Chamiec、Peter G. Sammes
DOI:10.1039/c39810001248
日期:——
The direct condensation of saturated or un-saturated aldehydes with methyl phenylsulphinylacetate can be effected with the products undergoing base catalysed rearrangements those from saturated aldehydes yielding γ-hydroxy-αβ-unsaturated esters, whilst croton-aldehyde gives rise to methyl 6-phenylsulphinylhexa-2,4-dienoate.