221903-33-9

Upstream product

• 221903-32-8 N-((2S)-4-ethyl-2,3-dihydrofuran-2-ylmethyl)-2,4-dinitrobenzenesulfonamide 
• 221903-24-8 3-(2-hydroxy-ethyl)-2-(1-methoxycarbonyl-vinyl)-indole-1-carboxylic acid tert-butyl ester 
• 221903-23-7 3-(2-acetoxy-ethyl)-2-(1-methoxycarbonyl-vinyl)-indole-1-carboxylic acid tert-butyl ester 
• 221903-22-6 3-(2-acetoxyethyl)-2-iodoindole-1-carboxylic acid tert-butyl ester 
• 221903-30-6 5-(tert-butyl-dimethyl-silanyloxymethyl)-3-ethyl-dihydro-furan-2-one 
• 221903-19-1 acetic acid 3-(2-formylamino-phenyl)-prop-2-ynyl ester 
• 221903-20-4 Acetic acid (Z)-3-(2-formylamino-phenyl)-allyl ester 
• 221903-29-3 2-[1-((S)-2,2-Dimethyl-[1,3]dioxolan-4-yl)-meth-(E)-ylidene]-butyric acid ethyl ester 
• 221903-21-5 Acetic acid (Z)-3-(2-isocyano-phenyl)-allyl ester 
• 606146-01-4 2-(3-hydroxy-1-propynyl)formanilide 
• 221903-31-7 ((S)-4-Ethyl-2,3-dihydro-furan-2-yl)-methanol 
• 10113-39-0 N-formyl-2-iodoaniline 
• 1656-44-6 2,4-dinitrobenzenesulfonyl chloride 

Downstream Products

• 221903-34-0 2-(3-{2-[(2,4-dinitro-benzenesulfonyl)-(4-ethyl-5-hydroxy-tetrahydro-furan-2-ylmethyl)-amino]-ethyl}-1H-indol-2-yl)-acrylic acid methyl ester 

Relevant academic research and scientific papers

Efficient total syntheses of (±)-vincadifformine and (-)-tabersonine

Stereocontrolled biomimetic total syntheses of the title compounds are described. Our syntheses feature a highly efficient preparation of the key intermediate 11 using our novel indole synthesis methodology. A novel amine protecting protocol by means of 2,4-dinitrobenzenesulfonamides has been developed to ensure the formation of the elusive secodine (3) as well as secodine-type intermediate (4) under very mild conditions.