70522-37-1

Upstream product

• 126365-61-5 ethyl 2-<3-hydroxy-2-methoxy-9-oxo-4-xanthenyloxy>-3-(4-hydroxy-3-methoxyphenyl)-3-oxopropionate 
• 33018-29-0 4-formyl-3-hydroxy-2-methoxyxanthone 
• 7572-90-9 ethyl 2-bromo-3-(4-benzyloxy-3-methoxyphenyl)-3-oxopropionate 
• 110597-47-2 3-benzyloxy-4-hydroxy-2-methoxyxanthone 
• 110597-48-3 ethyl 2-<9H-(3-benzyloxy-2-methoxy-9-oxo)xanthen-4-yl>oxy-3-oxo-3-(4-benzyloxy-3-methoxyphenyl)propionate 
• 126365-59-1 4-formyl-3-benzyloxy-2-methoxyxanthone 

Downstream Products

• 64280-51-9 diacetylkielcorin 
• 64280-48-4 (+/-)-kielcorin 
• 64280-48-4 (+/-)-cis-kielcorin 
• 126365-64-8 threo-1,3-diacetoxy-1-(4-acetoxy-3-methylphenyl)-2-<3-acetoxy-2-methoxy-9-oxo-4-xanthenyloxy>propane 
• 126365-64-8 erythro-1,3-diacetoxy-1-(4-acetoxy-3-methoxyphenyl)-2-<3-acetoxy-2-methoxy-9-oxo-4-xanthenyloxy>propane 

Relevant academic research and scientific papers

Total Synthesis of a Xanthonolignoid, Kielcorin

The reaction of 3-benzyloxy-4-hydroxy-2-methoxyxanthone with ethyl 2-bromo-3-(4-benzyloxy-3-methoxyphenyl)-3-oxopropionate in the presence of potassium tert-butoxide afforded the condensation product (8) which was converted to the debenzylation product (9