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DIOXOPYRROLINES .45. [2+2] PHOTOCYCLOADDITION OF 4-ETHOXYCARBONYL-5-ARYL-1H-PYRROLE-2,3-DIONE TO CYCLOPENTENE DERIVATIVES - FORMATION OF DIHYDROPYRIDONES
被引:9
|作者:
SANO, T
[1
]
HORIGUCHI, Y
[1
]
IMAFUKU, K
[1
]
TSUDA, Y
[1
]
机构:
[1] KANAZAWA UNIV, FAC PHARMACEUT SCI, KANAZAWA, ISHIKAWA 920, JAPAN
关键词:
cyclobutane;
cyclopentadiene;
cyclopentene;
dihydropyridone;
dioxopyrroline;
donor-acceptor interaction;
hydroindole;
indene;
photocycloaddition;
stereoselection rule;
D O I:
10.1248/cpb.38.366
中图分类号:
R914 [药物化学];
学科分类号:
100701 ;
摘要:
Photocycloaddition reactions of 4-ethoxycarbonyl-5-aryl-l//-pyrrole-2,3-dione (1) with cyclopentadiene, indene, and cyclopentene gave the dihydropyridones 8, 11, and 12 as major products, respectively. Formation of them can be rationalized by assuming the formation of a 2s + 2a adduct predicted by the stereoselection rule and subsequent skeletal rearrangement. The stereochemical results seem to support the hypothesis that the donor-acceptor interaction as theoretically deduced by Epiotis plays an important role in determining the stereochemical pathway of photo-cycloaddition. © 1990, The Pharmaceutical Society of Japan. All rights reserved.
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页码:366 / 369
页数:4
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