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x H R OH ОН R this method does not work Fischer esterification cannot be used...
(References] Rio de H* OH this method does work Fischer esterification cannot be used to prepare tert-butyl esters. Instead, carboxylic acids are treated with 2-methylpropene and an acid catalyst. Draw curved arrows to show the movement of electrons in this step of the reaction mechanism. Arrow-pushing Instructions no XT 30 -H HÖ H30* R R Submit Answer Try Another Version 2 item attempts remaining
OH H+ CH3 H3C OH Esters can be synthesized by an acid-catalyzed nucleophilic acyl substitution between an alcohol and a carboxylic acid; this process is called the Fischer esterification reaction. Because the alcohol oxygen is a poor nucleophile, the carbonyl carbon is made a better electrophile by protonation of the carbonyl oxygen. The steps of the synthesis are all reversible. The reaction is generally driven to completion by using an excess of the liquid alcohol as a solvent, or by...
HO OH ОН Ethylene oxide is the starting material for the synthesis of 1,4-dioxepane. Draw curved arrows to show the movement of electrons in this step of the reaction mechanism. Arrow-pushing Instructions :o: Hö: H-OH :0:
Ph3P CH3 Ph H3C H3C Eto2C The Fischer esterification reaction synthesizes an ester via a nucleophilic acyl substitution reaction The stereochemistry the alcohol oxygen that makes the nucleophilic attack. The Mitsunobu reaction, on the other hand, allows the synthesis of an ester in which the stereochemistry of the alcohol is inverted. The reaction involves a carboxylic acid and an alcohol, as well as triphenylphosphine and an azo compound termed diethyl azodicarboxylate DEAD). As with the Fischer esterification, H20 is formally...
draw curved arrows to show the movement of electrons in this step of the reaction mechanism HCI H2O NH,CI -CEN ОН Acid catalyzed hydrolysis of a nitrile to give a carboxylic acid occurs by initial protonation of the nitrogen atom, fo Draw curved arrows to show the movement of electrons in this step of the reaction mechanism Arrow-pushing Instructions O: x H -CI: -NH₂ SLIDE ty Another Mansion 1 terrattuttomat
OH ArSO3H + H2O Dihydropyran is synthesized by treating tetrahydrofurfuryl alcohol with an arenesulfonic acid, ArSO H. Draw curved arrows to show the movement of electrons in this step of the reaction mechanism. Arrow-pushing Instructions Quotes com " --Qat no-X O= O= 0 o= . = O -I
МСРВА Alkenes are oxidized to give epoxides on treatment with a peroxyacid, RCo,H, such as metachloroperoxybenzoic acid (MCPBA). Peroxyacids transfer an oxygen atom to the alkene with syn stereochemistry, i.e. both C-O bonds form on the same face of the double bond, through a single step mechanism without intermediates. The oxygen atom farthest from the carbonyl group is the one transferred. Draw curved arrows to show the movement of electrons in this step of the mechanism. Arrow-pushing Instructions - XT...
1. LiAIHA 2. H2O H3C NH2 H3C NH2 Amides are reduced to amines by treatment with LiAlH4. Two additions of hydride are required. The carbonyl oxygen atom is lost in complex with the aluminum. Draw curved arrows to show the movement of electrons in this step of the mechanism. Arrow-pushing Instructions no XT ... AH, NH2 H3C7NH, 30-AIHz H3C 7 H20+ Ho, H. NH, NH3 HAC NHA H3C OH Amides can be hydrolyzed to yield carboxylic acids. The conditions are...
CH н.. CH MSO он CH Draw curved arows to show the movement of electrons in this step of the reaction mechaniam Arrow-pushing Instructions Xm H H-H H-OH H2C CH3 нӧ: 10 iem atempts rmaining Submit Ans Try Another Vesion
CHO 1. NH2OH 2. Ac2o 3. CH,O CHO OH H- HO H HO H HCN H OH OH H- OH H- -OH H- CH2OH CH2OH The Wohl degradation is a series of reactions that shorten an aldose chain by one carbon, it is almost the exact opposite of the Kiliani In this reaction the aldose aldehyde carbonyl group is converted into a nitrile. The resulting cyanohydrin loses HCN under basic cone Conversion of the aldehyde to a nitrile is accomplished...