6.4 Consider the following reactions below: OH А + H2NCH3 4. O B ОН + HN(CH3)2...
Consider the following molecules: b. а. CHS CH3 O NH— CH—CH2—ОН NH2-CH-C-OH CHз d. C. CHз о Но-СН—С—ОН НО—С—С—С—ОН CH3 [Select ] i. Which of the molecules above is a secondary amine? ii. Which of the molecules above will be a zwitterion under physiological conditions (pH 7)? (Select) [Select ] ii. Which of the molecules above has two acidic protons?
Which compound is formed in the reaction below? NaBH CH3 2. 1. CH он 3. 4. он OH CH A. Compound 1 B. Compound 3 C. Compound 2 D. Compound 4
1. O o + HN-OH HN-OH NOHO = I-Z OSCH 0-5-CH3 O=0=0 cis and trans a = Proton transfer b = Lewis acid/base c=E2 elimination d=Sn2 Nucleophilic substitution e= Electrophilic aromatic substitution f= Carbonyl nucleophilic addn g= Nucleophilic subs at carbonyl(acyl Xfer) h = Conjugate (nucleophilic) addn Identify the mechanism by which each of the reactions above proceeds from among the mechanisms listed. Use the letters a - i for your answers. 1. 2.
25) Select the major product of the following series of reactions. OH 1) НОСI 2) CH3CH2MgBr 3) H20 ОН ОН d) a) с) b) 26) Select the structure of the first tetrahedral intermediate that is formed in the following reaction. CH3CH2OH, H Ph Ph но, ОН о9 Ph+OH ОН Ph OH OCH2CH3 Ph b) Ph+OH OCH2CH3 d) а) OH с) OCH CH3 но OCH2CH3 но l correlates to the
Consider the following three substrates: CH3 HO H3C. CH3 ş Br A C B Draw two separate reaction schemes combining A and B on one scheme, and next, A and Con the second scheme. For each reaction scheme, predict all products. Label the major and minor product(s). Show all stereochemical configurations in the products and give your reasons regarding the stereochemical outcomes of the reaction. Propose an appropriate solvent (be specific) for each scheme and give your reason. Finally, discuss...
please answer both
22) Which of the molecules below is a hemiacetal? OH HN А B D 23) Which molecule in question 22 is an enamine?
please draw the products for the following
reactions
Нас он HCI C OH 2 CH CH.CHICHAJCH.CH 1. Nah 2. CH3CH2CH(CH3)CHCI SOCI2 OH pyridine OH HBr
Which of the following alcohols is the least acidic? ОН OH OH OH 00 or а. NO2 b. OH C. Select one: a. Structure c b. Structure a c. Structure b d. Structured Which of the following alcohols is a secondary alcohol? Select one: a. 2-Methyl-2-pentanol b. 2-Ethyl-1-pentanol C. 4-Methyl-3-heptanol d. 3-Methyl-2-pentanol Arrange the following structures from the one with the least boiling point to the one with highest boiling point d HO ОН HO 10 A B с n...
4. Consider the following reaction: OC(CH3); (CH3)3COH Draw the byproducts of the reactions and use curved arrows to show the movement of electrons. a) b) What happens to the reaction ra i. The solvent is changed to DMF The concentration of-OC(CH3)3 is decreased ii. The base is changed to OH iv. The halide is changed to CHaCH2CH2CH2CH(Br)CH3 v. The leaving group is changed to
Mechanisms Question 1 (22 marks) (a) Consider the radical chain reactions of the alkane shown below with Br, in the presence of light. H3C HH H C-CCHS CH3 Br2 hv 2 Different mono- bromo products 25 °C + (you will need to look up the bond dissociation energy (BDE) for the types of bonds formed and broken in this reactions) (i) Give the structures of the products from the reaction and using standard arrow conventions show the series of mechanistic...