Efficient synthesis of oxindoles by thermal and rhodium(II)-catalyzed Wolff rearrangement
摘要:
An efficient synthesis of oxindoles is achieved from a thermal and rhodium(II)-catalyzed Wolff rearrangement of diazoquinolinediones in moderate yields. (C) 1999 Elsevier Science Ltd. All rights reserved.
Rhodium-Mediated Dipolar Cycloaddition of Diazoquinolinediones
摘要:
As an entry to furoquinoline structures of natural origin, the rhodium-mediated dipolar cycloaddition of diazoquinolinediones with alkenes and alkynes has been examined. Because of the unsymmetrical nature of the diazo compounds, both linear and angular furoquinoline products are possible. For the most part, a mixture of regioisomers is generated in moderate to good yields, though in a few cases dominant products are obtained in high yields. The products can be further converted to naturally occurring alkaloids such as isodictamnine. A novel observation in this work is that catalytic quantities of acid enhance the yield and regiochemical control in the cycloaddition.
Rhodium-Mediated Dipolar Cycloaddition of Diazoquinolinediones
作者:Michael C. Pirrung、Florian Blume
DOI:10.1021/jo982503h
日期:1999.5.1
As an entry to furoquinoline structures of natural origin, the rhodium-mediated dipolar cycloaddition of diazoquinolinediones with alkenes and alkynes has been examined. Because of the unsymmetrical nature of the diazo compounds, both linear and angular furoquinoline products are possible. For the most part, a mixture of regioisomers is generated in moderate to good yields, though in a few cases dominant products are obtained in high yields. The products can be further converted to naturally occurring alkaloids such as isodictamnine. A novel observation in this work is that catalytic quantities of acid enhance the yield and regiochemical control in the cycloaddition.
Efficient synthesis of oxindoles by thermal and rhodium(II)-catalyzed Wolff rearrangement
作者:Yong Rok Lee、Jung Yup Suk、Byung So Kim
DOI:10.1016/s0040-4039(99)01714-1
日期:1999.11
An efficient synthesis of oxindoles is achieved from a thermal and rhodium(II)-catalyzed Wolff rearrangement of diazoquinolinediones in moderate yields. (C) 1999 Elsevier Science Ltd. All rights reserved.