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What will the enolate for this be using LDA, THF, and cold temperatures? What will it be using NaOEt at rt?
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- QUESTION 6 What product forms when the following substance is treated with chloroform in the presence of KOH? o a. H... O a O b O c Od I, QUESTION 7 b. H CI H H... C. CI- H… CI I, d. CI H CI H...Which of the following does not support a nucleophilic attack of a covalent catalysis? a. Hydroxyl b. Sulfhydryl c. Imidazole d. Amino e. MethylWhich one of the following statements is incorrect? O Lithium diisopropylamide (LDA) is one of the most useful and common strong bases used in organic chemistry. O For a successful "crossed" condensation reaction of two carbonyl compounds that both have a-hydrogens, LDA is used to form the desired enolate ion and the other carbonyl compound is added slowly O Whereas a kinetic enolate anion is formed faster, a thermodynamic enolate anion is more stable. O HO or RO¯ are good bases to form the enolate of an aldehyde or ketone in an alkylation reaction. O For a successful "crossed" condensation reaction, a carbonyl compound with a- hydrogens is added slowly to a solution of the carbonyl compound without a- hydrogens and a base.
- Which product(s) will be formed preferentially in a base elimination? (1) (2) H KOH, EIOH Br Br (3) (4) Br ca. 2) and (4) ob. (1) and (3) c, 1) only (1) and (2) od. (2) only Oe.IWhat is the intermediate A for the following Stork enamine synthesis? O. CI 1. H,C. CH3 C12H1402 p-TSOH (-H,O) 2. H3O* A.In an aldol condensation where cyclopentanone reacts 1:1 with Ortho- methoxybenzaldehyde. How many signals would appear in an HNMR for the condensation product? а. 9. o b. 7 С. 10 d. 11 O . 8
- In Grignard reagent with bromobenzene and acetophenone, how would the reaction change if a student used ethanol as the solvent rather than diethyl ether? Dihydropyridin benzene would be the isolated product ethylbenzene would be the isolated product How can we c et would be an effective calcium channel blocker? the product would be unchanged, but the reaction rate would increase Dihydropyridines are because How can we change priveledged structures pyridines we made so that the product would be an effective calcium channel blocker? pharmacophore Dihydropyridines are because cium channel blocker? they tend to be biologically active and their biological target depends on what else is around them in the molecule they have the necessary bonding interactions to hit the enzyme How can we change the synthesis of the dihydropyridines we made so that the product would be an effective calcium channel blocker? change the aldehyde we change the beta-keto ester change the aminea. Draw the structure of the tetrahedral intermediate INITIALLY-FORMED in the reaction shown. You do not have to consider stereochemistry. Do not include counter-ions, e.g., Na+, I-, in your answer. In cases where there is more than one answer, just draw one b. Draw the structures of the organic products of the acyl transfer reaction. You do not have to consider stereochemistry. Draw the neutral form of the products; no charges. Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner. Separate multiple products using the + sign from the drop-down menu.What is the theoretical yield of an aldol condensation reaction involving cyclopentanone as the ketone and p-tolualdehyde as the aldehyde using sodium hydroxide as the base given the following quantities? Mass of Cyclopentanone used (0.2 mL): 0.2 g, Mass of p-Tolualdehyde used (0.8 mL): 1 g, Volume of 2 M sodium hydroxide: 3mL (excess).
- a. Draw the structure of the tetrahedral intermediate INITIALLY-FORMED in the reaction shown. H20 NH H2SO4 You do not have to consider stereochemistry. Do not include counter-ions, e.g., Na™, I¯, in your answer. In cases where there is more than one answer, just draw one. b. Draw the structures of the organic products of the acyl transfer reaction. You do not have to consider stereochemistry. Draw the neutral form of the products; no charges. Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner. Separate multiple products using the + sign from the drop-down menu.Identify the following structure if it will give a positive result to Fehling's Test1.does acetylsalicylic acid can hydrogen bond witha. itselfb.water2. determine the electrophilic and nucleophilic of acetylsalicylic acid
