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- A difficult problem in the synthesis of PGF2α is the introduction of the OH group at C15 in the desired conguration.a. Label this stereogenic center as R or S.b. A well known synthesis of PGF2α involves reaction of A with Zn(BH4)2, a metal hydride reagent similar in reactivity to NaBH4, to form two isomeric products, B and C. Draw their structures and indicate their stereochemical relationship.c. Suggest a reagent to convert A to the single stereoisomer X.A difficult problem in the synthesis of PGF2α is the introduction of the OH group at C15 in the desired configuration. a. Label this stereogenic center as R or S. b. A well known synthesis of PGF2α involves reaction of A with Zn(BH4)2, a metal hydride reagent similar in reactivity to NaBH4, to form two isomeric products, B and C. Draw their structures and indicate their stereochemical relationship. c. Suggest a reagent to convert A to the single stereoisomer X.Given that five isomeric compounds (A, B, C, D, E) with the molecular formula C5H10O were subjected to chemical tests after undergoing Clemmensen reduction compounds A,B, and C all yielded n-pentane, the results of these tests are provided in the table below. Can you draw the structures of compounds A to E based on the outcomes of the chemical tests?
- A difficult problem in the synthesis of PGF2α is the introduction of the OH group at C15 in the desired configuration. a. Label this stereogenic center as R or S. b. A well-known synthesis of PGF2α involves reaction of A with Zn(BH4)2, a metal hydride reagent similar in reactivity to NaBH4, to form two isomeric products, B and C. Draw their structures and indicate their stereochemical relationship. d. Suggest a reagent to convert A to the single stereoisomer X.An unknown hydrocarbon A with the formula C6H12 reacts with 1 molar equivalent ofH2 over a palladium catalyst. Hydrocarbon A also reacts with OsO4 to give diol B. When oxidized with KMnO4 in acidic solution, A gives two fragments. One fragmentis propanoic acid, CH3CH2CO2H, and the other fragment is ketone C. What are thestructures of A, B, and C? Write all reactions and show your reasoning.Aspirin, or 2-acetoxybenzoic acid, (C9H8O4) is often synthesised from salicylic acid.(i) Sketch and discuss any changes in the number of possible structural conformations ofaspirin relative to those of salicylic acid. (ii) Re-draw the structure predicted to be the lowest energy conformation of aspirin,indicating any expected stabilising and destabilising interactions. Justify your choice.
- On being heated with a solution of sodium ethoxide in ethanol, compound A (C7H15Br) yielded a mixture of two alkenes B and C, each having the molecular formula C7H14. Catalytic hydrogenation of the major isomer B or the minor isomer C gave only 3-ethylpentane. Suggest structures for compounds A, B, and C consistent with these observations.Compound A is an alcohol that undergoes oxidation to produce compound B.Compound B is a ketone that gives positive triiodomethane reaction. Compound B isthen reacted with phenyl magnesium bromide, C6H5MgBr in the presence of aqueousacid to form compound C. Compound C has the molecular formula of C9H12O. Deducethe structure for compound A, B and C. PLEASE PROVIDE CLEAR DRAWINGS AND EXPLANATIONSThe compound whose structure is shown here is acetyl acetone. It exists in two forms:the enol form and the keto form The molecule reacts with OH–to form an anion, [CH3COCHCOCH3] (often abbreviatedacac–for acetylacetonate ion). One or the most interesting aspects of this anion is thatone or more of them can react with transition metal cations to give stable, highlycolored compounds (a) Are the keto and enol forms of acetylacetone resonance forms? Explain youranswer.(b) What is the hybridization or each atom (except H) in the enol form? What changesin hybridization occur when it is transformed into the keto form?(c) What are the electron-pair geometry and molecular geometry around each C atomin the keto and enol forms? What changes in geometry occur when the keto formchanges to the enol form?(d) Draw three possible resonance structures for the acac–ion.(e) Is cis-trans isomerism possible in either the enol or the keto form of acetylacetone?(f) Is the enol form of acetylacetone polar?…
- A) Considering compounds 2a through 2l, identify: 1)one pair of geometric isomers 2)two pairs of enantiomers and 3)three pairs of identical molecules B) Give the names, including the configurations, of each of the geometric isomers and of each of the enantiomers identified in 1A and 1B. Draw the relevant structures. C) Sort compounds 2a, 2b, 2c, 2f and 2k in order of increasing solubility in water and briefly justify.1. what are the differences between acyclic and cyclic forms in terms of their physical properties? 2. what is the role of vinegar in liquid-liquid extraction?Write the major carbon containing product. Write optically active or racemic and if the reaction is E1, E2, SN1 or SN2