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- Isoleucine, another of the twenty amino acids found in proteins, is metabolized by a pathway that includes the following step. Propose a mechanism.Which of the following bases are strong enough to deprotonate CH3CH2CH2C≡CH (pKa = 25) so that equilibrium favors the products: (a) H2O; (b) NaOH; (c) NaNH2; (d) NH3; (e) NaH; (f) CH3Li?Which of the following bases are strong enough to deprotonate C6H5OH(pKa = 10) so that equilibrium favors the products:(a) H2O; (b) NaOH; (c) NaNH2; (d) CH3NH2; (e) NaHCO3; (f) NaSH; (g)NaH?
- Which of the following bases are strong enough to deprotonate C6H5OH (pKa = 10) so that equilibrium favors the products: (a) H2O; (b) NaOH; (c) NaNH2; (d) CH3NH2; (e) NaHCO3; (f) NaSH; (g) NaH?21-43 Give appropriate names for the following compounds: (а) (b) (с) CH;CH,CH,CH2 -C-ci Ph CH, CH,CH-C-N-Ph (d) (e) () H. CH3CH N-ċ-Ph CH3CH,-Č-0-Ph CH3CH 0-C-Ph (g) hoonon (h) (1) CH;CH,O OCH CH, (G) (k) (1) H,C CH- C-N(CH,CH3)2 H;C O.The key step in a reported laboratory synthesis of sativene, a hydrocarbon isolated from the mold Helminthosporium sativum, involves the following base treatment of a keto tosylate. What kind of reaction is occurring? How would you complete the synthesis?
- The rate constant for the uncatalyzed reaction of two molecules of glycine ethyl ester to form glycylglycine ethyl ester is 0.6 M- 1s - 1. In the presence of Co2 +, the rate constant is 1.5 * 106 M- 1s - 1. What rate enhancement does the catalyst provide?التاريخ تليله : Egbgbl You need to prefare l:5Lof 25 Wy Solutionof adurg, how much activeingredient is cequired?Doee the fillowng adld bee reaotlon, with CHOH as olvent, heve an equilibrlum that firvore the formetion of products? CHOH pK- 16 Hi pK = 19.3 pk- 36 (a) Yes (b) No, because the acid/base reaction is unfavorable, disregarding eolvent (c) No, because participation of the solvent (leveling effect) maken the reaction untavorable (d) Not enough Information avallable
- Provide a plausible arrow pushing mechantsm orthe reacion hekow Nite that he starting material contains an acidic proten on the carborycade and tbt FONO aso an acid You may assume that there is more han one eauveient oOND, Yry e a genenc corjugate base to transfer arotons NH2 WENWhich of the following reactions will not yield a carboxylic acid as a product? он (B) owool CrO3/H,0 (1) Oz/CH;Ch, -78°C (1) Mg, ether, A (A) Br (C) (2) H20 (2) CO2 (3) H* (dil /H¿O он H* /H2O A (D) Reaction D Reaction A Reaction Cc) Study the following reaction scheme for the preparation of a natural glycoside (compound 7) and answer the questions that follow: OH OAc Но excess Ac20 AcO pyridine, 0°C HO- Но. AcO- -OAc `0Ac HO Compound 3 Compound 4 HBr OCH3 OAc OAc AcO' AcO AcO AcO- OAc OAc Compound 6 Compound 5 Br NaOH, H2O OCH3 Он HO НО Compound 7 ii. Identify the unknown reagent(s) in the reaction scheme which converts compound 5 to compound 6.