Author:
Aasen AJ,Culvenor CCJ,Willing RI
Abstract
The conformations of
3-oxopyrrolizidine derivatives are discussed on the basis of an analysis of the
nuclear magnetic resonance spectrum of 3,5-dioxopyrrolizidine and partial data
for methyl 2,3- dioxopyrrolizidine-1-carboxylate and methyl 2β-hydroxy-3-
oxopyrrolizidine-1a-carboxylate. In each compound, H 7β is located forward
into the fold of the rings and is subject to a shielding influence which is
thought to be due to the C 8-C 1 single bond.
Cited by
4 articles.
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