2015
DOI: 10.5935/0103-5053.20150262
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Detailed1H and13C NMR Spectral Data Assignment for Two Dihydrobenzofuran Neolignans

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Cited by 8 publications
(10 citation statements)
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“…DBNs 1 – 10 were synthesized by oxidative coupling of methyl esters of coumaric acid ( a ) and ferulic acid ( b ), which was followed by further structural modification (hydrogenation, acetylation, methylation, or oxidation), as shown in Scheme . These compounds were evaluated as racemic mixtures of the trans ‐diastereoisomers, as evidenced by the coupling constant between H7 and H8, which is lower for the trans isomer (6.5 – 7.3 Hz) than for the cis isomer (8.2 – 8.4 Hz) …”
Section: Resultsmentioning
confidence: 99%
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“…DBNs 1 – 10 were synthesized by oxidative coupling of methyl esters of coumaric acid ( a ) and ferulic acid ( b ), which was followed by further structural modification (hydrogenation, acetylation, methylation, or oxidation), as shown in Scheme . These compounds were evaluated as racemic mixtures of the trans ‐diastereoisomers, as evidenced by the coupling constant between H7 and H8, which is lower for the trans isomer (6.5 – 7.3 Hz) than for the cis isomer (8.2 – 8.4 Hz) …”
Section: Resultsmentioning
confidence: 99%
“…DBNs 1 and 2 were synthesized by oxidative coupling of methyl coumarate ( a ) and methyl ferulate ( b ), respectively ( Scheme ), as previously reported . Compounds 3 – 10 were synthesized from compound 1 or 2 according to previously reported methodologies.…”
Section: Methodsmentioning
confidence: 99%
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“…23 Further acetylation of 1 and 2 afforded 4 ((±)-4-O-acetyl-trans-dehydrodicoumarate dimethyl ester) and 5 ((±)-4-O-acetyl-trans-dehydrodiferulate dimethyl ester). Oxidation with DDQ and further hydrogenation produced 6 ((±)-7,8-dehydrotrans-dehydrodicoumarate dimethyl ester) and 7 ((±)-7',8'-dihydro-7,8-dehydro-trans-dehydrodicoumarate dimethyl ester), respectively.…”
Section: Synthesis Of Dihydrobenzofuran Neolignans 1-8mentioning
confidence: 99%
“…Sendo assim, a estrutura diastereoisomérica que apresentar o menor EMAC e o coeficiente de correlação linear mais próximo do valor 1 será considerada a correta 76,77. : número total de deslocamentos químicos.Os parâmetros de comparação EMAC e o coeficiente de correlação linear foram aplicados na determinação da estereoquímica de diversas estruturas diastereoisoméricas de produtos naturais e sintéticos [75][76][77][78][79][80][81]. Em 2009, Smith e Goodman desenvolveram três novos parâmetros de comparação, chamados de CP1, CP2 e CP3 (abreviação do inglês "comparison parameter") e testaram esses parâmetros com 28 pares de diastereoisômeros, obtendo melhores resultados com o último (CP3) 69.…”
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