79328-87-3

Upstream product

• 865-47-4 potassium tert-butylate 
• 79328-86-2 1-(phenoxycarbonyl)-1,2-dihydropyridine 
• 74185-41-4 methyl α-methylene-1-(phenylsulfonyl)-1H-indole-2-acetate 
• 110-86-1 pyridine 

Downstream Products

• 79328-96-4 1-benzenesulfonyl-6-nor-20-deethylcatharanthine 
• 74195-04-3 (1S,4S,6S)-6-(1-Benzenesulfonyl-1H-indol-2-yl)-2-aza-bicyclo[2.2.2]oct-7-ene-2,6-dicarboxylic acid dimethyl ester 
• 79328-95-3 methyl 7-exo-(1-phenylsulfonylindol-2-yl)-2-azabicyclo[2.2.2]oct-5-ene-7-endo-carboxylate 
• 79329-05-8 C₂₅H₂₆N₂O₄S 
• 79328-99-7 1-benzenesulfonyl-6-nor-15-methoxy-15,20-dihydro-20-deethylcatharantine 

Relevant academic research and scientific papers

Diels-Alder Adducts of 1-Benzenesulfonylindole-2-acrylates and 1-(Alkoxycarbonyl)-1,2-dihydropyridines. Intermediates for Synthesis of Iboga Alkaloid Analogues

Diels-Alder reactions between methyl 1-benzenesulfonylindole-2-acrylate and several 1-(alkoxycarbonyl)-1,2-dihydropyridines give protected methyl 7-(2-indolyl)-2-azabicyclooctene-7-carboxylates which serve as intermediates for the synthesis of analogues of the iboga alkaloids.Methods for deprotection of both the carbamate nitrogen and indole nitrogen are reported.The 7-(2-indolyl)-2-azabicyclooctene-7-carboxylates show a tendency to undergo fragmentation of the C-1,C-7 bond of the 2-azabicyclooctene ring, probably by retro-Mannich reactions.Several 6-nor-20-deethyl analogues of catharanthine have been prepared from intermediates derived from the deprotected Diels-Alder adducts.