96291-81-5

Upstream product

• 96291-80-4 (4R,5S)-4-Isopropyl-2,2,5-trimethyl-[1,3]dioxolane-4-carboxylic acid 
• 96246-61-6 (7R,7aS)-7-(2-Nitro-benzyloxy)-1-phenylselanyl-hexahydro-pyrrolizine-1-carboxylic acid methyl ester 
• 96246-62-7 (7R,7aR)-7-(2-Nitro-benzyloxy)-5,6,7,7a-tetrahydro-3H-pyrrolizine-1-carboxylic acid methyl ester 
• 96246-60-5 7-(2-Nitro-benzyloxy)-2,5,6,7-tetrahydro-3H-pyrrolizine-1-carboxylic acid methyl ester 
• 96246-64-9 [(7R,7aR)-7-(2-Nitro-benzyloxy)-5,6,7,7a-tetrahydro-3H-pyrrolizin-1-yl]-methanol 
• 96246-65-0 (2S,3R)-2,3-Dihydroxy-2-isopropyl-butyric acid (7S,7aS)-7-(2-nitro-benzyloxy)-5,6,7,7a-tetrahydro-3H-pyrrolizin-1-ylmethyl ester 
• 20267-93-0 lycopsamine A N-oxide 
• 72213-98-0 parsonsine 

Relevant academic research and scientific papers

Ideamine N-Oxides: Pyrrolizidine Alkaloids Sequestered by the Danaine Butterfly, Idea leuconoe

Two new pyrrolizidine alkaloids, ideamines A and B, together with other analogs (lycopsamine and parsonsine) were isolated in the N-oxide forms from adult bodies of the Apocynaceae-feeding danaine butterfly, Idea leuconoe.Ideamine A was characterized as a homolog of lycopsamine, in which the viridifloric acid moiety was replaced by a 2-ethyl-2,3-dihydroxybutanoic moiety.Likewise, ideamine B was identified as a nor-derivative of parsonsine, in which the trachelanthic acid moiety was replaced by a 2-ethyl-2,3-dihydroxybutanoic moiety diastereomeric to the necic acid from ideamine A.

Nonstabilized Imidate Ylides by the Desilylation Method: A Route to the Pyrrolizidine Alkaloids Retronecine and Indicine

Imidate ylides, members of the azomethine ylide family, are generated by desilylation of N- imidate salts with CsF.This technique is used to prepare monoprotected retronecine 16 starting from butyrolactam.The route is improved over