can you reduce imines using NaBH4?
One molecule of NaBH4 can in theory reduce four ketone functional groups. If you had 25 mg of NaBH4, how many many mg of benzil could be fully reduced?
can NaBH4 reduce two ketones ? how many H’s does LiALH4 deliver?
Does NaBH4 reduce aldehydes, esters, or both?
calculate the minimum mass of NaBH4 needed to reduce 350mg of Vanillin. Vanillin m/w= 152.15 g/mol NaBH4 m/w= 37.83 g/mol 4 moles of vanillin + 1 mole NaBH4 yeilds 4 moles Vanillyl Alcohol
1. Similarly to ketones, imines can be utilized as carbon nucleophiles. Draw the mechanism how imine G has been formed starting from ketone H and amine l H2N cat. H
1. Explain why one molecule of NaBH4 will reduce only two molecules of benzil. 2. In the case of reducing benzil, how many stereo centers will be produced?
How many moles of camphor could be theoretically reduced by the amount of NaBH4 used (.0150 mol used), given that NaBH4 can technically reduce four molecules of ketone? The amount of camphor that was used was 1.27 g (.00834 mol). Please show how you got it.
19.59 Identify the reactants that you would use to make each of the following imines: (b) 19.60 Identify the reactants that you would use to make each of the following enamines: 19.61 Predict the major product(s) obtained when each of the follow- ing compounds undergoes hydrolysis in the presence of H30 19.62 Identity all of the expected products when below is treated with aqueous acid: roducts when the compound Excess H3O+
3. NaBH4 usually reacts slowly or not at all with esters. Therefore, LiAlH4 is often needed to reduce esters. Why do you think LiAlH4 is more reactive than NaBH4 (Hint: Compare the electronegativity of H versus Al or B).
Amines can act as 1 point O Nucleophiles Bronsted Bases Both as Nucleophile and Bronsted base O Neither as Nucleophile nor Bronsted base Clear selection Amides + LiALH4 = amines 1 point True False Imines + NaBH4 = amines 1 point true false amides + Br2 in NaOH = amines 1 point true