ChemInform Abstract: A Novel Counterion Effect on the Diastereoselectivity in the MnIII(Salen)-Catalyzed Epoxidation of Phenyl-Substituted cis-Alkenes.

A Novel Counterion Effect on the Diaster

A Novel Counterion Effect on the Diastereoselectivity in the MnIII(salen)-Catalyzed Epoxidation of Phenyl-Substituted cis-Alkenes

✍ Waldemar Adam; Konrad J. Roschmann; Chantu R. Saha-Möller 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 228 KB 👁 1 views

The catalytic oxidation of the phenyl-substituted cis alkenes 1a,b by the Mn III (salen)X complexes 3a-f with iodosyl benzene (PhIO) as oxygen source affords the corresponding epoxides 2a,b in cis/trans ratios of 79:21 to 26:74. The diastereoselectivity (cis/trans ratio) depends on the counterion of