Natural 1-amidopyrrolizidines, absouline and labumamine, were synthesized via stable pyrrolizidin-1-one hydrobromide. Amides, eater derivatives and aminopyrrolidinoimidazole analogues were also prepared and their biological activities tested. (C) 2000 Elsevier Science Ltd. All rights reserved.
Natural 1-amidopyrrolizidines, absouline and labumamine, were synthesized via stable pyrrolizidin-1-one hydrobromide. Amides, eater derivatives and aminopyrrolidinoimidazole analogues were also prepared and their biological activities tested. (C) 2000 Elsevier Science Ltd. All rights reserved.