Ad. Borthwick et al., Stereoselective synthesis of gem-dimethyl-5,5-pyrrolidine-trans-lactam (5-oxo-hexahydropyrrolo[3,2-b]pyrrole), TETRAHEDR L, 42(39), 2001, pp. 6933-6935
The gem-dimethyl-trans-lactam 6 could be prepared by alkylation of the beta
-methyl isomer 7 but not by alkylation of the alpha -isomer 5. (C) 2001 El
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