A chemist finds that the addition of (+)@epinephrine to the catalytic reduction of butan2-one gives a product that is slightly optically active, with a specific rotation of +0.45°. Calculate the percentages of (+)@butan@2@ol and (-)@butan@2@ol formed in this reaction.
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A chemist finds that the addition of (+)@epinephrine to the catalytic reduction of butan2-one gives a product that is slightly optically active, with a specific rotation of +0.45°. Calculate the percentages of (+)@butan@2@ol and (-)@butan@2@ol formed in this reaction.
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- Provide two reasons why the compound below would be a good substrate for studying trypsin catalyzed reactions. NON CH,4. Following is the mechanism proposed for the inactivation of monoamine oxidase by N-cyclopropyl-a-methyl benzylamine. The reaction uses flavin (Fl) coenzyme. In the first step, the flavin is an oxidant accepting one electron from the amine substrate making it a (cation) radical. Propose the step-by-step mechanisms for the last two steps of the reactions circled. при при CH3 FI FI SU Ph N H 3.88 HO nám NaBH4 Ph CH3 H S mhm Ph مسکن به ۳۰ به H₂O H₂ FI S CH3 Ph NH₂ CH3 Ph H CH3 H при FIH S wh S whuTo solve this problem, you need to read the description of the Hammett s, r treatment given in Chapter 15, Problem 92. When the rate constants for the hydrolysis of several morpholine enamines of para-substituted propiophenones are determined at pH 4.7, the r value is positive; however, when the rates of hydrolysis are determined at pH 10.4, the r value is negative.a. What is the rate-determining step of the hydrolysis reaction when it is carried out in a basic solution?b. What is the rate-determining step of the hydrolysis reaction when it is carried out in an acidic solution?
- Which one of the following statements about arene oxides is FALSE? O The NIH shift is what makes arene oxides carcinogenic. O Ring opening of an arene oxide can afford an addition product and/or a rearranged product. O Large polycyclic aromatic hydrocarbons such as benzo[a]pyrene are especially susceptible to arene oxide formation. The NIH shift mechanism was discovered at the National Institutes of Health. O Cytochrome P450 is the powerful biological oxidant that epoxides an arene to give an arene oxide.b) Optical isomers can often be formed during these reactions. For products A-H indicate how many different optical isomers you expect to form for each from these reactions (you do not have to indicate whether they are diastereomers/enantiomers). c) In the preparation of substance D by ozonolysis, the second step is necessary treatment of the reaction mixture with zinc in acetic acid. If we forgot this step, we would get substance V instead of substance D, which would probably explode when isolated. What is the structure of substance V? *24 X 1: ozone V e) What products do you expect to form if they react with alkene X: I - HBr in diethyl ether; II - Brl in methanol; III - PhSCI in diethyl ether; IV - Selectfluor in methanol. P M EtOH NA EtONa PhSNa EtOH E H+ O TsCl Pyridín F- T2, Pd/C G4 mCPBA H₂SO4 10 %, H₂O 1: BH3 H◄ 2: H₂O₂ ill X Br₂ cyclohexane HCI A > В B HBr warmth, benzoylperoxid 1: ozone 2: Zn, ACOH Mg THF с D D₂O K I + J NaOHWrite a mechanism for the bromination of trans- cinnamic acid that proceeds through a bromonium ion intermediate that clearly shows the stereochemical outcome of the reaction. Draw perspective drawings of the products produced and indicate the configuration (R or S) at each stereocenter.
- Account for the rapid rate of methanolysis of ClCH2OCH2CH3 even though the substrate is a primary halide. Hint: The reaction of the substrate with ethanol proceeds by SN1 mechanism. Draw the Lewisstructures.The formation of Br2 from NBS first involves the reaction of NBS with HBr to form an iminol intermediate and molecular bromine. The intermediate then undergoes acid-catalyzed tautomerism to form succinimide, the byproduct of the reaction. Propose a curved-arrow mechanism for the conversion of NBS into succinimide that also accounts for the formation of Br2.We are currently working with diastereomeric products of acid-base reactions in my organic chemistry class and while I understand the basics of the creation of selectively soluble salt products, drawing the reactions has always been difficult. Our prelab asks us to "draw the expected diasteromeric products from the reaction of racemic phenylsuccinic acid with excess (s)-methylbenzylamine and label the chiral centers" I would really appreciate some help with this!
- Stereoisomers of α-bromocinnamic acid: draw the reaction mechiansim with arows for the dehydrobromination of 2,3-dibromo-3-phenylpropanoic acid with ethanol and KOH to produce (Z)-α-bromocinnamic acid and (E)-α-bromocinnamic acid. Also draw the transition state for The (Z)-isomer syn-periplanar transition state and anti-periplanar transition state of the (E)-isomer.Draw the correct product(s) for the following oxidative cleavage reaction ()кМnO,, он , heat () н,оb) In order to synthesis 1-phenylbutan-1-ol, you started the reaction with a hydration of prop-1-ene using the hydroboration method. Then you oxidized the intermediate with KMNO4. Finally, alkylation using C6HSMGB was performed to obtain the final product. However, the reaction was not successful. Analyse the reaction by explaining what happened to the reaction and provide the correct synthetic method.