引用本文:
Hong Bin SUN, Wei Yi HUA, Si Xun PENG. ASYMMETRIC EPOXIDATION OF CHROMENE DERIVATIVES WITH HYDROGEN PEROXIDE CATALYZED BY OPTICALLY ACTIVE Mn (Ⅲ) SALEN COMPLEX[J]. Chinese Chemical Letters,
1995, 6(11): 927-930.
Citation: Hong Bin SUN, Wei Yi HUA, Si Xun PENG. ASYMMETRIC EPOXIDATION OF CHROMENE DERIVATIVES WITH HYDROGEN PEROXIDE CATALYZED BY OPTICALLY ACTIVE Mn (Ⅲ) SALEN COMPLEX[J]. Chinese Chemical Letters, 1995, 6(11): 927-930.
Citation: Hong Bin SUN, Wei Yi HUA, Si Xun PENG. ASYMMETRIC EPOXIDATION OF CHROMENE DERIVATIVES WITH HYDROGEN PEROXIDE CATALYZED BY OPTICALLY ACTIVE Mn (Ⅲ) SALEN COMPLEX[J]. Chinese Chemical Letters, 1995, 6(11): 927-930.
ASYMMETRIC EPOXIDATION OF CHROMENE DERIVATIVES WITH HYDROGEN PEROXIDE CATALYZED BY OPTICALLY ACTIVE Mn (Ⅲ) SALEN COMPLEX
摘要:
A highly practical asymmetric epoxidation procedure for the synthesis of optically pure epoxychromans has been developed which employs 30% hydrogen peroxied as the oxidant and the Jacobsen-catalyst as the catalyst.The presence of imidazole has a significant effect on epoxidation rates and total turnovers.A variety of chromene derivatives were converted into corresponding epoxides of 89~100% ee in 72~92% isolated yields.
English
ASYMMETRIC EPOXIDATION OF CHROMENE DERIVATIVES WITH HYDROGEN PEROXIDE CATALYZED BY OPTICALLY ACTIVE Mn (Ⅲ) SALEN COMPLEX
Abstract:
A highly practical asymmetric epoxidation procedure for the synthesis of optically pure epoxychromans has been developed which employs 30% hydrogen peroxied as the oxidant and the Jacobsen-catalyst as the catalyst.The presence of imidazole has a significant effect on epoxidation rates and total turnovers.A variety of chromene derivatives were converted into corresponding epoxides of 89~100% ee in 72~92% isolated yields.
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