On the synthetic approach to the protopine alkaloids |
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| Authors: | Kazuhiko Orito Yoshitaka Kurokawa Mitsuomi Itoh |
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| Institution: | Department of Chemical Process Engineering, Hokkaido University, Sapporo 060, Japan |
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| Abstract: | The synthetic approach to the protopine alkaloids is described. Efficient construction of the alkaloid models 16a and 16b was accomplished by the general synthetic method consisting of photo-oxygenative ring enlargement of tetrahydrobenzindenoazepines 13a and 13b by singlet oxygen and further elaboration of the resultant 10-membered amido-ketone products 14a and 14b. |
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