POHMAKOTR, MANAT;CHANCHARUNEE, SIRIRAT, TETRAHEDRON LETT., 1984, 25, N 37, 4141-4144
作者:POHMAKOTR, MANAT、CHANCHARUNEE, SIRIRAT
DOI:——
日期:——
Chiral Spiro Phosphoramide-Catalyzed Sulfa-Michael Addition/Enantioselective Protonation of Exocyclic Enones
作者:Yi-Pan Li、Shou-Fei Zhu、Qi-Lin Zhou
DOI:10.1021/acs.orglett.9b03615
日期:2019.12.6
A highly efficient asymmetric Michael addition of thiols to exocyclic enones was achieved by using chiral spiro phosphoramide catalysts. The precisely chiral control in the protonation of the enol intermediate ensured high enantioselectivity. The reaction features high activity (yields up to 99%, turnover numbers up to 8400) and high enantioselectivity (up to 97% ee) with a broad substrate scope, and
Intramolecular acylation of α-sulfinyl carbanion a new general route to 5-methylene-2-cyclopentenones
作者:Manat Pohmakotr、Sirirat Chancharunee
DOI:10.1016/s0040-4039(01)90204-7
日期:1984.1
A convenient synthesis of 5-methylene-2-cyclopentenones including Methylenomycin B involving the intramolecular acylation of α-sulfinylcarbanion followed by methylation and pyrolysis is described.