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- Can someone explain the answers to 28, 29, and 30? The answers are B, A, A. I understand lindar catalyst makes cis alkenes and Na/NH3 makes trans alkenes but I dont understand how the second step of Br2, OsO4 influences the stereochemistry between the 2 . Will rate quickly if helpful. Thanks!Suppose we aempt the conversion of fumaric acid to deuterated malic acid with BD3·THF,followed by oxidation with D2O2in NaOD(aq). Show all the possible stereoisomers (as Fisherprojections) that may be formed, and draw the mechanistic pathways (showing stereochemistry)that lead to these possible productsE. J. Coreys 1964 total synthesis of -caryophyllene (essence of cloves) solves a number of problems of construction of unusual-sized rings. The first step uses an efficient photochemical [2 + 2] reaction. The desired stereochemistry and regiochemistry had been predicted based on model reactions. (a) [2 + 2] Reactions are quite common in photochemical reactions. Would this reaction be predicted to occur in the ground state? The next steps follow. Basic alumina is a chromatography support that will often act as a base catalyst. (b) What is the mechanism of the first step? (c) What is the mechanism of the second step? (d) Look at later steps in the synthesis. Does the stereochemistry of the added carbomethoxy group matter? The next steps are shown here. (e) What is the structure of compound (A)? (f) Give a mechanism for the formation of the cyclized product. (g) Give a mechanism for the first step. Hint: Attack on the lactone carbonyl may be the first step. (h) Give a structure for product (B). The following two steps are next. (i) Show the reactions of (B). (j) Write a mechanism for the ring-opening reaction. Hint: Note the presence of an acidic proton and a good leaving group in the molecule. The synthesis was completed by the following steps. (k) What is (C)? (l) What reagents would you use for these transformations?
- Can you pls assist me with the mechanism of Benzyl alcohol being oxidised to Benzyl aldehyde and to Benzoic acid using KMnO4 as an oxidant. Showing arrows and everything.Polyunsaturated fatty acids (PUFA's) in oils 0.g. sunflower oil are prone to rancidity because they contain conjugated double bond systems which are easily oxidized in the presence of light or peroxides. BHT Is used as an antioxidant in oils to prevent oxidative rancidity. How do BHT prevent oils from reacting with peroxides so that they do not become rancid? Show the mechanism.The rate constant for the uncatalyzed reaction of two molecules of glycine ethyl ester to form glycylglycine ethyl ester is 0.6 M- 1s - 1. In the presence of Co2 +, the rate constant is 1.5 * 106 M- 1s - 1. What rate enhancement does the catalyst provide?
- I am working on a practice assignment for my organic II course and am having difficulty with a question that asks to identify the reaction sequence used to synthesize isopropylcyclopentane. I would really appreciate the help!Please Write out the mechanism for the multistep synthesis belowShow the mechanism of the conversion of 2-methyl-1-propene (shown below) into PAN (peroxyacetylnitrate) and CO2 in the atmosphere
- SHOW COMPLETE SOLUTIONS Q3. Which isolate has A260/280 ratio of above 2.0?Protein: SHAYNERSE Predict the products of the following reactions with the protein given, if there is none, write NO RXN. Hg/HNO3 HNO3When some sugars dissolve in water they spontaneously undergo changes in optical rotation called mutarrotation. The Mutarrotation of D-glucopyranose is catalyzed by acid and bases. 2-Hydroxypyridine is a more effective catalyst than phenol and pyridine for this reaction because: a.Both oxygen and N in 2-hydroxypyridine act as bases increasing the rapid interconversion of sugar b. The OH of 2-hydroxypyridine serves as the base while the current N as the acid. c. 2-hydroxypyridine acts both as a base to remove the proton from the hydroxyl group in the hemiacetal and as an acid to provide a proton to the oxygen in the hemiacetal. d.Phenol and pyridine are very expensive.