Question 1. (10 Marks) Provide the MAJOR organic product(s) to complete the following
transformations. All stereochemical consequences and relationships must be indicated
in your answers.
Question 2. (6 marks) Under each structure below, use the appropriate letter(s) to
indicate whether the compound is an acetal (A), hemiacetal (HA), ketal (K), hemiketal
(HK), or not applicable (NA):
One of the compounds shown in the question above is a KETAL. In the space below,
provide the carbonyl containing starting material(s) that under acidic conditions would
form this ketal.
Question 3. (10 Marks) Provide the missing starting material(s) or MAJOR product(s) to
complete the following reactions. For full marks, ALL stereochemistry must be shown
Question 4. (12 Marks) Complete the reaction scheme below by providing the major
product(s) in the box. In the space provided below, give a complete step-by-step
mechanism that leads to the product(s), including all mechanistic curved-arrows, lone
pairs of electrons and any resonance structures if appropriate.
These solutions may offer step-by-step problem-solving explanations or good writing examples that include modern styles of formatting and construction
of bibliographies out of text citations and references. Students may use these solutions for personal skill-building and practice.
Unethical use is strictly forbidden.