Enantioselective protonation of samarium enolates by a C2-symmetric chiral diol
摘要:
High enantioselectivity (up to 97%ee) have been achieved in the protonation of samarium enolates which were generated by SmI2-mediated cross-coupling reaction between unsymmtrical dialkylketene and allyl iodide, using a C-2-symmetric chiral diol as a proton source. The stereochemistry of enolate formation and of the enantioselective protonation is discussed.
High enantioselectivity (up to 97%ee) have been achieved in the protonation of samarium enolates which were generated by SmI2-mediated cross-coupling reaction between unsymmtrical dialkylketene and allyl iodide, using a C-2-symmetric chiral diol as a proton source. The stereochemistry of enolate formation and of the enantioselective protonation is discussed.
HAENER, R.;SCHWEIZER, W. B.;SEILER, P.;SEEBACH, D., CHIMIA, 1986, 40, N 3, 97-98
作者:HAENER, R.、SCHWEIZER, W. B.、SEILER, P.、SEEBACH, D.