Tropic acid was synthesized from methyl phenylacetate and paraformaldehyde by condensation inpresence of sodium bicarbonate to give methyl propate, which subjected to hydrolysis in an overall yield of 67.8%.
Capsaicin and(E)-4-hydroxy-3-methoxybenzyl-8-methylnon-6-enoate were important intermediate of medicine.This research proposed a new method for synthesizing them from 6-bromohexanoic ester by Wittig reaction to give(Z...Capsaicin and(E)-4-hydroxy-3-methoxybenzyl-8-methylnon-6-enoate were important intermediate of medicine.This research proposed a new method for synthesizing them from 6-bromohexanoic ester by Wittig reaction to give(Z)-8-methyl-6-nonenoic acid(4),then treated by nitrous acid and NaNO2 to induce Z→E isomerization reaction of the carbon-carbon double bond,then followed by condensation reaction to give product in an overall yield of 31%.The method is more convenient than traditional methods.展开更多
文摘Tropic acid was synthesized from methyl phenylacetate and paraformaldehyde by condensation inpresence of sodium bicarbonate to give methyl propate, which subjected to hydrolysis in an overall yield of 67.8%.
文摘Capsaicin and(E)-4-hydroxy-3-methoxybenzyl-8-methylnon-6-enoate were important intermediate of medicine.This research proposed a new method for synthesizing them from 6-bromohexanoic ester by Wittig reaction to give(Z)-8-methyl-6-nonenoic acid(4),then treated by nitrous acid and NaNO2 to induce Z→E isomerization reaction of the carbon-carbon double bond,then followed by condensation reaction to give product in an overall yield of 31%.The method is more convenient than traditional methods.