Distannoxane-catalysed transesterification of 1,n-diol diacetates. Selective transformation of either of chemically equivalent functional groups

A Practical and Green Chemical Process: Fluoroalkyldistannoxane-Catalyzed Biphasic Transesterification

“…[6] We suppose that the tert-butyl ester moiety in 4 a is first transformed into the methyl ester, which is then attacked intramolecularly by the free amino group to afford the final product 4 b. To exclude the possibility that the amide was…”

The First Spacer-Bridged Tetraorganodistannoxanes with a Mixed Double Ladder Structure

“…Currently, there is much interest in dimeric tetraorganodistannoxanes [R 2 (X)SnOSn(X)R 2 ] 2 (X ϭ halogen, OH, RЈCO 2 , NCS; R, RЈ ϭ alkyl, aryl) [1Ϫ5] since these compounds are reported to be efficient homogeneous catalysts in various organic reactions such as transesterification under virtually neutral conditions, [6] highly selective acylation of alcohols, [7] urethane formation, [8] and alkyl carbonate synthesis. [9] X-ray crystallography has illustrated the dimeric nature of a large number of tetraorganodistannoxanes and NMR spectroscopic studies show that this structural arrangement is retained in solution.…”

Unusual deactivation in the asymmetric hydrogenation of itaconic acid

“…2 Supplementary information). Metal promoted esterification of itaconic acid with a titanium catalyst [14] and of other organic carboxylic compounds [15] has been previously reported in the literature.…”