Patil, Dilip G.; Chawla, H. P. S.; Dev, Sukh, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1983, vol. 22, # 3, p. 200 - 205
Stereochemical and spectroscopic studies on the reaction of allylstannanes with aldehydes
作者:Scott E. Denmark、Eric J. Weber、Thomas M. Wilson、Timothy M. Willson
DOI:10.1016/0040-4020(89)80016-x
日期:1989.1
for the reacting double bonds in the Lewis acid-induced reaction of allylic stannanes and aldehydes has been examined. Model system 1 shows a strong and Lewis-acid independent preference for the synclinal orientation of double bonds. A possible stereoelectronic basis for this preference is discussed. A13C-NMR spcctroscopic study of the reaction between crotyltrialkylstannanes (9) and acetaldehyde (10)
On the stereochemistry of allylmetal-aldehyde condensations. Preliminary communication
作者:Scott E. Denmark、Eric J. Weber
DOI:10.1002/hlca.19830660604
日期:1983.9.21
The stereochemical course of the intramolecular allylsilane-aldehyde condensation of 1a has been investigated. A modest preference for the product arising from a synclinal orientation of double bonds was observed with Lewis-acid catalysts. Cyclization induced by fluoride ion resulted in stereochemical reversal.
Comparison of cationic rhodium and iridium complexes in directed homogeneous hydrogenation
作者:John M. Brown、Stephen A. Hall
DOI:10.1016/s0040-4020(01)82359-0
日期:1985.1
The hydrogenation of endo-6-methylenebicyclo[2,2,2]octan-2-ol catalysed by a range of rhodium and iridiumcomplexes has been investigated. Unlike the corresponding exo-alcohol, reduction is highly stereoselective leading to 95 – 99.7% of endo-exo-6-methylbicyclo[2,2,2]octan-2-ol. Selectivity is much less pronounced for the corresponding methyl ether. Rhodium catalysts promote a competitive isomerisation