Investigation of chiral induction in photochemical oxetane formation
作者:H. Koch、J. Runsink、H.-D. Scharft
DOI:10.1016/s0040-4039(00)88139-3
日期:1983.1
The formation of oxetanes from photochemicaladdition of tetramethylethylene (TME) or diethylketeneacetal with phenylglyoxylic acid esters in the “concave” position leads to high diastereomeric excess (de).
Hauts rendements optiques obtenus dans la synthese d′α-alkylα-hydroxyesters par reaction d'alkoxytrialkylaluminates encombres avec le phenylglyoxalate de menthyle.
作者:A Deberly、G Boireau、D Abenhaǐm
DOI:10.1016/s0040-4039(00)99963-5
日期:1984.1
Enantiomeric purities in alkylation of (+) and (−) menthyl esters of phenylglyoxilic acid by complexes derivedfrom AlEt3 and the lithium salts of (+) and racemic Darvon alcohol are depending upon the only stereochemistry of the menthyl group in ester. These results suggest that the observed stereoselectivity is to be related to the bulkiness of the organometallic reagent, which overcomes the asymetric