131146-40-2

Upstream product

• 139-85-5 3,4-dihydroxybenzaldehyde 
• 93831-20-0 (2E,4Z)-2-(4-Benzyloxy-phenyl)-5-(3,4-bis-benzyloxy-phenyl)-3,4-dihydroxy-penta-2,4-dienoic acid 
• 68641-16-7 (4-benzyloxy-phenyl)-acetic acid methyl ester 
• 6547-53-1 2-[4-(benzyloxy)benzyl]acetic acid 
• 5447-02-9 3,4-dibenzyloxybenzaldehyde 
• 93831-19-7 3',4',4-tribenzyloxypulvinone 
• 51282-20-3 3-(3',4'-dimethoxyphenyl)-4-methoxy-5-<(4''-methoxyphenyl)methylene>furan-2(5H)-one 
• 131146-34-4 3-(3',4'-dimethoxyphenyl)-4-methoxy-5-<(4''-methoxyphenyl)methyl>furan-2(5H)-one 
• 929688-03-9 (Z)-3-(3,4-dimethoxyphenyl)-4-hydroxy-5-(4-methoxybenzylidene)furan-2(5H)-one 
• 131146-38-8 3-(3',4'-dihydroxyphenyl)-5-(4''-hydroxyphenyl)methylene-4-methoxyfuran-2(5H)-one 
• 93831-18-6 (Z)-5'-(3,4-dibenzyloxybenzylidene)cyclohexanespiro-2'-(1',3'-dioxolan)-4'-one 

Relevant academic research and scientific papers

Novel synthesis of naturally occurring pulvinones: A heck coupling, transesterification, and Dieckmann condensation strategy

Phosphine-free Heck alkenylations of iodoarenes with trifluoroethyl 2-acetoxyacrylate (19) led stereoselectively to trifluoroethyl (Z)-2-acetoxycinnamates 31-34, 42, 44, and 51. Deacetylation followed by acylation with N,N′-dicyclohexylcarbodiimide activa

Pigments of Fungi. XV An Efficient, Unambiguous Route to Unsymmetrically Substituted Dibenzyl Acyloins and their Use in the Synthesis of Fungus Pigments of the Pulvinone and Grevillin Types

Dibenzyl acyloins including those bearing unsymetrically disposed aryl residues are assembled in high yield by reaction between the O-trimethylsilyl ethers of arylacetaldehyde cyanohydrins and benzyl Grignard reagents.These acyloins are deprotonated with

Dioxolanones as Synthetic Intermediates. Part 2. Synthesis of Tetronic Acids and Pulvinones

The utility of 1,3-dioxolan-4-ones as intermediates in the synthesis of tetronic acids is examined.The reaction of dioxolanone (1) with lithium enolates of 2-substituted methyl or t-butyl acetates at -78 deg C in tetrahydrofuran afforded a general synthesis of 2-substituted tetronic acids (3) - (8).Treatment of (1) with the anions of 2-substituted acetonitriles led to formation of the corresponding 3-substituted-2-aminofuran-4(5H)-ones (13) and (14).A route to unsymmetrically substituted pulvinones by reaction of 5-arylidene-2,2-pentamethylene-1,3-dioxolan-4-ones with appropriately substituted phenylacetic ester anions has been devised.Thus, the preparation of the naturally occurring pigment 3',4',4-trihydroxypulvinone (18) was achieved via intermediate in which the phenolic groups were protected as benzyl ethers.The dioxolanone (26) has been used in the preparation of 2-acyl-4-benzylidenetetronic acids.