Nilsson BM, De Boer P, Grol CJ, Hacksell U. An improved synthesis of the enantiomers of BM-5 and their effects on the central in vivo release of acetylcholine.
Chirality 1992;
4:367-76. [PMID:
1449950 DOI:
10.1002/chir.530040607]
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Abstract
Racemic N-methyl-N-(1-methyl-4-pyrrolidino-2-butynyl)acetamide (BM-5), a putative postsynaptic agonist and presynaptic antagonist at muscarinic receptors, was resolved into the enantiomers by a new method suitable for large scale preparation. The method involves a chemoselective N-debenzylation as the key step. The enantiomers of BM-5 were obtained after six separate steps in 25% overall yield. The ability of the enantiomers to release acetylcholine was evaluated in vivo by use of brain dialysis. (R)-BM-5 was the more potent enantiomer in this assay.
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