HOOCH H CH₂NH2 Tranexamic acid, a drug useful against blood clotting, is prepared commercially from p-methylbenzonitrile. Following is one of the steps in its synthesis, draw the structure of the product of this step. COOH 0 CH₂Br 989 ་་་ 1. excess NH3. 2. H3O+ ? n ? Previous Next
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- X6-156. Arrange the following substituted anilines in increasing order of reactivity toward acetic anhydride: sllo NH2 ร้อเป็น NH2 NH2 edi NH2 O₂N. (a) (b) ---- (c) (d) bund NO2 CI H3C-N-CH3 Insmiy X 6-157. Suggest a mechanism for the preparation of acetic anhydride from acetic acid and acetyl chloride in the presence pyridine (an amine base).A solution of acetone [(CH3)2C = O] in ethanol (CH3CH2OH) in the presence of a trace of acid was allowed to stand for several days, and a new compound of molecular formula C7H16O2 was formed. The IR spectrum showed only one major peak in the functional group region around 3000 cm−1, and the 1H NMR spectrum is given here. What is the structure of the product?3) Venlafaxine is a Wyeth antidepressant that is synthesized on a commercial scale from the starting material shown. Suggest a plausible synthesis using the same starting material. MeO MeO H₂N. OH
- Chemistry 3. Provide reagents/conditions to accomplish the following syntheses. Several steps are required in some cases. (c) (d) H2N. NH2 но H. NH2 но3) Venlafaxine is a Wyeth antidepressant that is synthesized on a commercial scale from the starting material shown. Suggest a plausible synthesis using the same starting material. CI MeO MeO H₂N OHH₂C ཏཱཏི 1 ནི OH 1. Br2, PBг3 2. H₂O H3C OH Br The a-bromination of carbonyl compounds by Br2 in acetic acid is limited to aldehydes and ketones because acids, esters, and amides don't enolize to a sufficient extent. Carboxylic acids, however, can be a-brominated by first converting the carboxylic acid to an acid bromide by treatment with PBr3. Following enolization of the acid bromide, Br2 reacts in an a-substitution reaction. Hydrolysis of the acid bromide completes the reaction. Draw curved arrows to show the movement of electrons in this step of the mechanism. Arrow-pushing Instructions :0: H3C Br Br + :::OH2 Br H₂O H3C Br за
- Synthesize the following compound from benzonitrile (C6H5CN):Provide the major expected product: OH OH LOH H2SO4 A.Amantadine is effective in preventing infections caused by the influenza A virus and in treating established illnesses. It is thought to block a late stage in the assembly of the virus. Amantadine is synthesized by treating 1-bromoadamantane with acetonitrile in sulfuric acid to give N-adamantylacetamide, which is then converted to amantadine. CH,C=N in H,SO, Br NHCCH3 NH2 1-Bromoadamantane Amantadine (a) Propose a mechanism for the transformation in Step 1. (b) Describe experimental conditions to bring about Step 2.
- Which of the following reactions will synthesize phenol from benzene? 1) HNO3 + H2SO4; 2) Fe, HCl; 3) NaNO2, HCl, 0-10 oC; 4) warm H2SO4 and H2O 1) HNO3 + H2SO4; 2) Fe, HCl; 3) NaNO2, HCl, 0-10 oC; 4) CuCN; 5) dilute acid and heat 1) Acetyl chloride & AlCl3; 2) bleach 1) Ph-N2+ + KI; 2) BrMgCH=CH2 in ether, followed by H3O+; 3) warm, conc'd KMnO4 1) Cl-CH(CH3)-CH2CH2CH3 + FeBr3; 2) hot, conc'd KMnO4Following is a retrosynthetic analysis for the synthesis of the herbicide (S)-Metolachlor from 2-ethyl-6-methylaniline, chloroacetic acid, acetone, and methanol. CI OMe OMe OMe 'N' HN N CI. + НО, Chloroacetic acid (S)-Metolachlor 3 NH2 CI + MEOH OMe Acetone Methanol 2-Ethyl-6-methylaniline Show reagents and experimental conditions for the synthesis of Metolachlor from these four organic starting materials. Your synthesis will most likely give a racemic mixture. The chiral catalyst used by Novartis for reduction in Step 2 gives 80% enantiomeric excess of the S enantiomer.1. There are several isomeric alkanes of molecular formula C6H14.Two of these exhibit the following 1H-NMR spectra. Propose a structure for each of the isomers. Isomer A: δ = 0.84 (d, 12 H), 1.39 (septet, 2H) ppm Isomer B: δ = 0.84 (t, 3 H), 0.86 (s, 9H), 1.22 (q, 2H) ppm