conformers

Which conformer, K or L is predicted to be more stable? Explain your answer (Assign the absolute (R or S) configurations for each of the chiral carbons in carbohydrates M and N. Are either of these compounds optically active? Briefly explain your answer.

Practice exercise

I attempted some of this but I am clueless as to some of the other stuff. Can you help?

Missing materials

please see attached document

synthesis

Synthesize the following compound You may also use any organic compounds containing three or less carbon atoms, benzene, N-bromosuccinimide, triphenylphosphine, meta-chloroperbenzoic acid (MCPBA), methylvinyl ketone, lithium diisopropylamide (LDA), ethyl acetoacetate (acetoacetic ester) and diethyl malonate (malonic ester), as well as any inorganic reagents.

synthesis

Synthesize the following compound from the indicated starting material. You may also use any organic compounds containing three or less carbon atoms, benzene, N-bromosuccinimide, triphenylphosphine, meta-chloroperbenzoic acid (MCPBA), methylvinyl ketone, lithium diisopropylamide (LDA), ethyl acetoacetate (acetoacetic ester) and diethyl malonate (malonic ester), as well as any inorganic reagents.