oxazolidines;
enolates;
titanium and compounds;
asymmetric reactions;
D O I:
10.1016/S0040-4020(01)01150-4
中图分类号:
O62 [有机化学];
学科分类号:
070303 ;
081704 ;
摘要:
The reaction of chiral 2-alkoxy-3-sulfonyl-1,3-oxazolidines and trichlorotitanium enolates was applied for the stereoselective construction of quaternary a-carbonyl stereocentres on cycloalkanones. The influence of different chiral 1,3-oxazolidines on the selectivity and yield of this reaction has been studied. 2-Alkoxy-3-sulfonyl-1,3-oxazolidines bearing one small group in the 4 position or two trans-arranged groups in the 4 and 5 position have been found to give the best results. (C) 2002 Elsevier Science Ltd. All rights reserved.
机构:
CHRISTIAN ALBRECHTS UNIV KIEL,INST ORGAN CHEM,OLSHAUSENSTR 40,W-2300 KIEL 1,GERMANYCHRISTIAN ALBRECHTS UNIV KIEL,INST ORGAN CHEM,OLSHAUSENSTR 40,W-2300 KIEL 1,GERMANY
CONDEFRIEBOES, K
HOPPE, D
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机构:
CHRISTIAN ALBRECHTS UNIV KIEL,INST ORGAN CHEM,OLSHAUSENSTR 40,W-2300 KIEL 1,GERMANYCHRISTIAN ALBRECHTS UNIV KIEL,INST ORGAN CHEM,OLSHAUSENSTR 40,W-2300 KIEL 1,GERMANY