Enantioselective reductions of aromatic ketones with ammonia–borane complexes of chiral tetraphenyl-18-crown-6 derivatives
作者:Billy L. Allwood、Hooshang Shahriari-Zavareh、J. Fraser Stoddart、David J. Williams
DOI:10.1039/c39840001461
日期:——
Enantioselectivereductions of prochiral aromaticketones with adducts formed between ammonia-borane and (2R,3R,11R,12R)- and (2S,3S,11S,12S)-tetraphenyl-1,4,7,10,13,16-hexaoxacyclo-octadecane, (RRRR)-(3) and (SSSS)-(3), have afforded the corresponding (S) and (R) aromatic secondary alcohols with enantiomeric excesses of 20–67%.
MERZ, A.;EICHNER, M.;TOMAHOGH, R., LIEBIGS ANN. CHEM., 1981, N 10, 1774-1784
作者:MERZ, A.、EICHNER, M.、TOMAHOGH, R.
DOI:——
日期:——
DIETL, F.;MERZ, A.;TOMAHOGH, R., TETRAHEDRON LETT., 1982, 23, N 50, 5255-5258
作者:DIETL, F.、MERZ, A.、TOMAHOGH, R.
DOI:——
日期:——
[EN] MALONATE ESTERS<br/>[FR] ESTERS DE MALONATE
申请人:PFIZER IRELAND PHARMACEUTICALS
公开号:WO2010070593A2
公开(公告)日:2010-06-24
The invention provides a compound of formula (I), in an enantiomerically enriched form; wherein R1 and R2 are each independently selected from optionally substituted alkyl, cycloalkyl, aryl-alkyl and aryl, wherein the 3S-enantiomer is present in excess and the enantiomeric excess is at least 10%. There is also provided a method of preparing, in an enantiomerically enriched form, the compound of formula (I). Use of a compound of formula (I) in a method of preparing pregabalin is also discussed.