Coumarin tuaj yeem npaj tau los ntawm ntau lub npe tshuaj tiv thaiv, nrog rau Perkin cov tshuaj tiv thaiv ntawm salicylaldehyde thiab acetic anhydride ua piv txwv nrov. Pechmann condensation muab lwm txoj hauv kev rau coumarin thiab nws cov derivatives, xws li Kostanecki acylation, uas tuaj yeem siv los tsim chromones.
Yuav ua li cas yog siv rau kev sib txuas ntawm coumarin?
Pechmann txoj kev tau siv rau kev sib txuas ntawm coumarin derivatives nyob rau hauv lub xub ntiag ntawm FeCl 3 ·6H 2O [101]. Qhov ua tau ntawm hlau ntsev catalysts tau pom nyob rau hauv cov tshuaj tiv thaiv condensation ntawm resorcinol thiab methyl acetoacetate.
Cov zaub mov twg muaj coumarins?
Coumarin, lossis yog 1, 2-benzopyrone, tshwm sim nyob rau hauv tonka taum thiab cinnamon, tab sis kuj tuaj yeem pom muaj nyob hauv kab hauv cov nyom nyom, tshuaj yej ntsuab, carrots, thiab txawm ib co beers.
Coumarins ua haujlwm li cas?
Coumarin derivatives kuj tseem yog cov tshuaj tiv thaiv kab mob hauv qhov ncauj. Lawv nthuav tawm cov txiaj ntsig kho mob los ntawm ua raws li kev sib tw inhibitors hauv txoj kev coagulation cascade. Lawv inhibit qhov kev ua ntawm vitamin K uas yuav tsum tau rau biosynthesis ntawm prothrombin.
Koj lub npe coumarins li cas?
Phytochemistry . Coumarins tshuav lawv lub npe rau 'coumarin' uas yog lub npe nrov rau tonka taum (Dipteryx odorata), los ntawm qhov yooj yim compound coumarin yog thawj zaug cais nyob rau hauv 1820.
