314280-34-7Relevant academic research and scientific papers
Efficient enantiomeric synthesis of pyrrolidine and piperidine alkaloids from tobacco
Felpin,Girard,Vo-Thanh,Robins,Villieras,Lebreton
, p. 6305 - 6312 (2007/10/03)
An enantiomeric synthesis of six piperidine and pyrrolidine alkaloids, (S)-nornicotine 1, (S)-nicotine 2, (S)-anatabine 3, (S)-N-methylanatabine 4, (S)-anabasine 5, and (S)-N-methylanabasine 6, known as natural products in tobacco, was established from a common chiral homoallylic (S)-3-(1-azidobut-3-enyl)-pyridine 15. An intramolecular hydroboration-cycloalkylation of the homoallylic azide intermediate 15 served as the key step in the pyrrolidine ring formation. A ring closing metathesis reaction (RCM) of a diethylenic amine intermediate (S)-allyl-(1-pyridin-3-yl-but-3-enyl)-carbamic acid benzyl ester 20 served as the key step in the piperidine ring formation. From the commercially available 3-pyridinecarboxaldehyde 13, a short and convenient enantiomeric synthesis of tobacco alkaloids is described: (S)-nornicotine I (5 steps, with an overall yield of 70%), (S)-hicotine 2 (6 steps, 65%), (S)-anatabine 3 (8 steps, 30%), (S)-N-methylanatabine 4 (8 steps, 25%), (S)-anabasine 5 (8 steps, 35%), and (S)-N-methylanabasine 6 (8 steps, 25%).
Total synthesis of (S)-anabasine and (S)-anatabine
Felpin,Vo-Thanh,Robins,Villieras,Lebreton
, p. 1646 - 1648 (2007/10/03)
A chiral synthesis of (S)-anabasine and (S)-anatabine from 3-pyridinecarboxaldehyde, via a ring closing metathesis reaction (RCM) as the key step, is reported in 8 steps for both products with overall yields of 35% and 30%, respectively.
