Photocyclization of n-[ω-(cycloalken-1-yl)alkyl]-and n-[ω-(inden-3-yl)alkyl]phthalimides : Synthesis of spiro-nitrogen multicyclic systems |
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| Authors: | Minoru Machida Kazuaki Oda Yuichi Kanaoka |
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| Affiliation: | Faculty of Pharmaceutical Sciences, Higashi-Nippon-Gakuen University, Ishikan-Tobetsu, Hokkaido 061-02 Japan;Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060 Japan |
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| Abstract: | ![]()
Photolysis of the N-[ω-(cycloalken-1-yl)alkyl]phthalimides 6b- in each case gave a pair of stereoisomers of spiro-nitrogen multicyclic systems (9b-) in moderate yields, whose stereochemistry was determined by means of chemical and spectroscopic analyses. Similarly, in N-[ω-(inden-3-yl)alkyl]-phthalimides (8), spiro-nitrogen macrocycles up to 13-membered 13a- were obtained in good yields |
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