13107-53-4

Upstream product

• 53143-91-2 2,2-diethoxy-tetrahydro-pyran 
• 88-14-2 2-furanoic acid 
• 64-17-5 ethanol 

Downstream Products

• 2067-33-6 5-bromopentanoic acid 
• 22668-36-6 ethyl 5-oxopentanoate 
• 1354803-76-1 5-ethoxy-5-oxypentyl 9-(3-fluorbenzyl)-5,6,8,9-tetrahydro-7H-pyrido[4',3':4,5]pyrrolo[2,3-b]pyridine-7-carboxylate 
• 1254568-93-8 ethyl 5-((tert-butyldiphenylsilyl)oxy)pentanoate 
• 473611-23-3 ethyl 5-oxo-7-phenylhept-6-ynoate 
• 542-28-9 3,4,5,6-tetrahydro-2H-pyran-2-one 
• 76865-42-4 (+/-)-6,t-8b,9,10,11,12,13,t-13a-octahydro-5H-7-thia-12a-azabenzonaphth<1,2,3-cd>azulene 
• 331825-31-1 (5Z,8Z,10E)-12-(tert-Butyl-diphenyl-silanyloxy)-15-diazo-14-oxo-icosa-5,8,10-trienoic acid ethyl ester 

Relevant academic research and scientific papers

Selective hydrogenolysis of 2-furancarboxylic acid to 5-hydroxyvaleric acid derivatives over supported platinum catalysts

The conversion of 2-furancarboxylic acid (FCA), which is produced by oxidation of furfural, to 5-hydroxyvaleric acid (5-HVA) and its ester/lactone derivatives with H2 was investigated. Monometallic Pt catalysts were effective, and other noble metals were not effective due to the formation of ring-hydrogenation products. Supports and solvents had a small effect on the performance; however, Pt/Al2O3 was the best catalyst and short chain alcohols such as methanol were better solvents. The optimum reaction temperature was about 373 K, and at higher temperature the catalyst was drastically deactivated by deposition of organic materials on the catalyst. The highest yield of target products (5-HVA, δ-valerolactone (DVL), and methyl 5-hydroxyvalerate) was 62%, mainly obtained as methyl 5-hydroxyvalerate (55% yield). The byproducts were mainly ring-hydrogenation compounds (tetrahydrofuran-2-carboxylic acid and its ester) and undetected ones (loss of carbon balance). The catalyst was gradually deactivated during reuses even at a reaction temperature of 373 K; however, the catalytic activity was recovered by calcination at 573 K. The reactions of various related substrates were carried out, and it was found that the O-C bond in the O-CC structure (1,2,3-position of the furan ring) is dissociated before CC hydrogenation while the presence and position of the carboxyl group (or methoxy carbonyl group) much affect the reactivity.

The products of hydrolysis of cyclic orthoesters as a function of pH and the theory of stereoelectronic control

The acid hydrolysis of cyclic orthoesters 1, 3-6 (R=Me), and 2 (R=Me and Et) as a function of pH was studied.The bicyclic orthoester 5 yields mainly the hydroxy-ester (less than 5percent lactone), and this result is essentially independent of pH.For the other orthoesters, the relative percentage of products differs for each case and varies with pH.At pH3.These results are explained on the basis of the stereoelectronic theory for the cleavage of tetrahedral intermediates.