Desymmetrization of spiro-activated meso-cyclopropanes via nucleophilic substitution
摘要:
The spiro-activated cyclopropane 1 undergoes desymmetrization either with Li-thiophenoxide in the presence of a chiral complexing ligand, or with ion pairs formed from thiophenols and aromatic chiral amines. The latter procedure is more efficient and provides the ring-opened thioether 6 in up to 79% yield and up to 60% ee. (c) 2005 Elsevier Ltd. All rights reserved.
SINGH R. K.; DANISHEFSKY S., J. ORG. CHEM. <JOCE-AH>, 1976, 41 NO 9, 1668-1669
作者:SINGH R. K.、 DANISHEFSKY S.
DOI:——
日期:——
Verbrugge,P.A. et al., Synthetic Communications, 1977, vol. 7, p. 1 - 11
作者:Verbrugge,P.A. et al.
DOI:——
日期:——
Desymmetrization of spiro-activated meso-cyclopropanes via nucleophilic substitution
作者:Paul Müller、David Riegert
DOI:10.1016/j.tet.2005.03.005
日期:2005.5
The spiro-activated cyclopropane 1 undergoes desymmetrization either with Li-thiophenoxide in the presence of a chiral complexing ligand, or with ion pairs formed from thiophenols and aromatic chiral amines. The latter procedure is more efficient and provides the ring-opened thioether 6 in up to 79% yield and up to 60% ee. (c) 2005 Elsevier Ltd. All rights reserved.