3. C Which set of reagents will accomplish the transformation shown? H H (a) Lindlar's catalyst (b) P-2 catalyst (c) Li in EtNH2 (d) both (a) and (b)

How will you synthesize cyclohexanecarboxaldehyde (cyclohexylmethanal) from the following reagents? (There are no restrictions on the reagents or the number of steps). (a) Cyclohexanone (b) Ethynylcyclohexane (c) Methyl cyclohexylformate (Remember: Formic acid is the IUPAC recognized name for Methanoic acid) (d) Cyclohexanecarboxylic acid (Cyclohexylmethanoic acid) (e) Vinylcyclohexane

Provide reagents

4.  identify the structure of A and B in the following synthetic scheme: Write out complete reactions for each step, showing the structure of all reactants and products.       (a) cyclohexanol +Na2Cr2O7/H2SO4, H2O -------> A        (b)  A + Et2NH/H2SO4 ----->B

Draw the structural formula(s) for the major product(s) of each of the following reactions. Unless required, ignore stereochemical details.

Consider the following structural formulas. OH H;C CH3 CH3 F G H (a) Which of the compounds F-l can easily be subjected to an elimination reaction? (b) Provide the reaction mechanism for all eliminations under (a).

10) Consider the following alkene hydration reaction. он H2SO, H20 Given that the reaction is endergonic by 10 kcal/mol, complete the following. (a) Draw the intermediate(s) formed in the mechanistic pathway to the major product in the indicated space below. If there are multiple intermediates label them 1, 2, 3, 4, etc. (b) Sketch a reaction-energy profile for this reaction and clearly label staring material, product, intermediate(s), transition state(s), AG" and AG (of the rate determining step) on your plot. Progress of the reaction Draw and Label Intermediate(s) Below: Potential energy

What reagents would be required to perform the following reaction ? (A) NaBH4, CH₂OD (E) LIAID, CH₂OH (B) NaBH4, CH₂OH OH (C) NaBD4, CH₂OD (D) NaBD4, CH₂OH

provide all reagents and structure but not required more than four steps.

Draw the structures of the missing reactant, reagent, or major organic products (s) of D and E