42123-26-2

Upstream product

• 2955-22-8 6,7-methylenedioxy-1-(3,4,5-trimethoxyphenyl)naphthoic anhydride 
• 122763-44-4 dimethyl 4-(3,4-trans)-hydroxy-6,7-(methylenedioxy)-1-(3',4',5'-trimethoxyphenyl)-3,4-dihydronaphthalene-2,3-dicarboxylate 
• 859072-49-4 5-(3,4,5-trimethoxy-phenyl)-naphtho[2,3-d][1,3]dioxole-6,7-dicarboxylic acid 
• 858022-48-7 7-chloromethyl-8-(3,4,5-trimethoxy-phenyl)-naphtho[2,3-d][1,3]dioxole-6-carboxylic acid 
• 98449-79-7 5′-methoxyretrochinensin 
• 116097-17-7 3,4-methylenedioxy-6-(3',4',5'-trimethoxybenzoyl)phenylacetic acid 
• 155004-78-7 methyl 3,4-methylenedioxy-6-(3',4',5'-trimethoxybenzoyl)phenylacetate 
• 116097-18-8 6,7-methylenedioxy-1-(3',4',5'-trimethoxyphenyl)-2-benzopyran-3-one 
• 4521-61-3 3,4,5-Trimethoxybenzoyl chloride 
• 326-59-0 benzo[1,3]dioxol-5-yl-acetic acid methyl ester 
• 184427-51-8 Acetic acid (6-formyl-benzo[1,3]dioxol-5-yl)-(3,4,5-trimethoxy-phenyl)-methyl ester 
• 86-81-7 3,4,5-trimethoxy-benzaldehyde 
• 762-42-5 dimethyl acetylenedicarboxylate 
• 75101-87-0 dimethyl 1,4-epoxy-1,2,3,4-tetrahydro-6,7-(methylenedioxy)-1-(1,2-cis)-(3',4',5'-trimethoxyphenyl)-2,3-cis-naphthalenedicarboxylate 

Relevant academic research and scientific papers

Synthesis of Podophyllum Lignans via an Isolable o-Quinonoid Pyrone

The 2-benzopyran-3-one 10 is a stable, isolable and useful Diels-Alder diene; its methyl 4-benzoyloxycrotonate adduct 23 formed regioselectively and stereoselectively in acetonitrile is reduced with H2/Pd to give 31 with inversion of C-1 stereochemistry.T

Comprehensive Synthetic Route to Eight Diastereomeric Podophyllum Lignans

An oxabicyclo compound, 9, prepared in 47percent yield through an isobenzofuran intermediate was converted with excellent regio- and stereocontrol to eight (+/-)-lignan lactones of the podophyllotoxin series.One of the eight, epiisopicropodophyllin, 36, t