11) Propose a synthesis of ethylcyclohexane using cyclohexane, ethane, Br2, Li, Cul and UV light (you may use each reagent and ÚV light more than once).

8A2 Using ethyl bromide as a starting material and with the help of the appropriate Grignard reagent prepare the following alcohols. i) 3-pentanol ii) 2-methyl-2-butanol;

3. Provide a synthetic scheme for the transformation below. Your scheme must include all reagents & intermediates and account for stereochemistry & regiochemistry where appropriate. All carbon atoms in the product must come from the starting materials provided. OH OH

This is not A or C. The second one is not A or D

The following series of reactions will yield 2) CI-CH2-CH2-C6H5 1) CH3CH2SH + N2OH O 2-chloro-4-ethyl-benzenesulfonic acid O CH;CH2-S-CH2CH2C6H5 O ortho-chloro-ethyl-benzene O 1-phenyl-3-chloro-propane O CH3CH2-O-CH2CH2C6H5

What is the major organic product obtained from the following reaction? -- تمرة AICI 3 ب ب میں مجھ IV I O

2,5-cyclohexdiene-1,4-dione is completely ozonolyzed followed by hydrolysis to get a compound A which on further complete oxidation gives compound B. Identify A and B and write their IUPAC names.

a) b) 1. Provide the necessary reagents to carry out the following transformations. 왜 H H OMe

Hydration of alkynes (via oxymercuration) gives good yields of single compounds only with symmetrical or terminalalkynes. Show what the products would be from hydration of each compound.(a) hex-3-yne