69998-62-5

Upstream product

• 35274-53-4 2-bromo-3,4,5-tri-methoxybenzaldehyde 
• 69998-61-4 (iodo-2 methylenedioxy-4,5 benzyl)-3 butanolide-4 
• 84736-28-7 (methylenedioxy-3,4 benzylidene) α-hemisuccinate de methyle 
• 96548-65-1 3-(benzo[d][1,3]dioxol-5-ylmethyl)-4-methoxy-4-oxobutanoic acid 
• 86-81-7 3,4,5-trimethoxy-benzaldehyde 
• 15930-53-7 6-bromo-3,4-methylenedioxybenzaldehyde 
• 80483-34-7 4-(1,3-benzodioxol-5-ylmethyl)-4,5-dihydrofuran-2(3H)-one 
• 120-57-0 piperonal 

Downstream Products

• 61038-90-2 (+/-)-picrostegane 
• 61038-90-2 (+/-)-isostegane 
• 69998-63-6 (+/-)-epipicrosteganol-8 
• 69998-63-6 (+/-)-8α-hydroxyisopicrostegane 

Relevant academic research and scientific papers

SYNTHESES TOTALES ET ETUDES DE LIGNANES BIOLOGIQUEMENT ACTIFS-I. APPLICATION DE LA REACTION D'ULLMANN A LA SYNTHESE DE BIARYLES PRECURSEURS DE LIGNANES BISBENZOCYCLOOCTADIENES

Several biaryls bearing various substituents on both rings were synthesized in a preparativ fashion, and in yields up to 88percent by a technical improvement on the classical Ullmann reaction.All these biaryls bear reactive functional groups (i.e. formyl, methoxycarbonyl, dimethoxycarbonylpropyl and butanolidylmethyl) in both the o and o' positions.The biaryls 9, 13, 21 and 26-33 are plausible synthons for bisbenzocyclooctadiene lignans such as schizandrin and steganacin.