Resolution of 1-substituted-3-methyl-3-phospholene 1-oxides by molecular complex formation with TADDOL derivatives
作者:Tibor Novák、Viktória Ujj、József Schindler、Mátyás Czugler、Miklós Kubinyi、Zsuzsa A. Mayer、Elemér Fogassy、György Keglevich
DOI:10.1016/j.tetasy.2007.11.028
日期:2007.12
The antipodes of 1-aryl-, 1-alkyl- and 1-alkoxy-3-methyl-3-phospholene 1-oxides 1a-h and 1-phenyl-3-methyl-3-phospholene 1-sulfide li were separated in good yields and high enantiomeric excesses (Lip to >99% ee) by resolution via formation of diastereomeric complexes with either (-)-(4R,5R)-4,5-bis(diphenylhydroxymethyl)-2,2-dimethyldioxolane 2 (TADDOL) or (-)-(2R,3 R)-alpha,alpha,alpha',alpha'-tetraphenyl-1,4-dioxaspiro[4.5]decan-2,3-dimethanol 3. The stereostructure of the Supramolecular formations and the absolute configurations of the 3-phospholene oxides 1a, le and If were elucidated by single crystal X-ray crystallography. CD spectroscopy was also useful in determining, the absolute configurations of some phospholene oxides 1b, 1c, 1g and 1h. (c) 2007 Elsevier Ltd. All rights reserved.