ISSN:
0018-019X
Schlagwort(e):
Chemistry
;
Organic Chemistry
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
Irradiation (λ 〉 280 nm) of 3-hydroxy-1H-pyrrole-2-carboxylates 1 in CH3CN gives the [2.2′-bi(3-oxo-2,3-dihydro-1H-pyrrole)]-2-,2′-dicarboxylates 2 in reasonable to good yields. The corresponding N-methylpyrroles 3 only undergo slow photodecomposition under similar conditions. Several 2-methyl-3-oxo-2,3-dihydro-1H-pyrrole-2-carboxylates 4 and 5 were synthesized to compare their spectral data with those of the dehydrodimers 2. A X-ray structure analysis was performed for diethyl [2,2′-bi(4,5-dimethyl-3-oxo-2,3-dihydro-1 H-pyrrole)]-2,2′-dicarboxylate (2b). The originally proposed [3,3′-bi(3H-pyroole)] structure for compounds 2a-e proves incorrect.
Zusätzliches Material:
1 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/hlca.19840670734
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