What is the Aldol addition product formed from the reaction of acetone, (CH3)2CO, with itself?

Predict the product for the following reaction.         

What is the product of the following reaction (after acidic work-up)?

Which of the following is not a good method to make 2,2-dimethylpropanoic acid?

Why doesn’t nucleophilic acyl substitution stop at the tetrahedral intermediate?

Which structure is consistent with the following 1H NMR spectrum?

What is the major organic product of the following sequence of reactions?

Compound A has a molecular formula of C4H8O3.  Identify A on the basis of its 1H NMR spectra: d2.6 (2H, triplet); 3.4 (3H, singlet); 3.7 (2H, triplet); 11.3 (1H, broad singlet).

Bonus question Provide an efficient stepwise synthesis for the following.        The answer should be entered as in the following example: (this is an example!) 1. NaNH2   2. CH3CH2Br   3. H2, Lindlar’s Cat.    4. BH3, THF   5. H2O2, NaOH                          (Keep three spaces between each step) All chemicals and reagents  structures should be correct and with the proper sequence. No partial credit.

Which of the following reagent(s) can be used to carry out the following conversion?