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1. Give the major product for each of the following transformations involving conversion of a carboxylic...
PRACTICE the skill 19.8 Draw a plausible mechanism for each of the following transformations: EtO OEt...
PRACTICE the skill 19.8 Draw a plausible mechanism for each of the following transformations: EtO OEt MeO OMe H,SO excess EtOH [H2SO) excess MeOH -н.о H,O (b) (a) но Он M,SO но он H,SO -н,о O -н,о (d) (c) 19.9 The natural product frontalin is a pheromone isolated from the pine beetle Dendroctonus frontalis, a species that accounts for much of the diseased timber found in the northern hemisphere. The following reaction was a step in a synthesis of frontalin:...
Propose an efficient synthesis for each of the following transformations: O OH. - H20 1) [H*),...
Propose an efficient synthesis for each of the following transformations: O OH. - H20 1) [H*), HO 2) NaNH2 3) Eti 1) [H"), HO 2) Eti O H. - H2O 4) H30* OH-H20 1) [H"). HO 2) NaNH2 3) Eti 4) H30 O H. - H20 1) [H*). HO 2) NaNH2 3) H30 ОН 1) [н']), но 2) LiAIH, он, - H,0 он, - H,0 1) [н'], но 2) Н, 3) НО* 1) [н'], но 2) H2 он, -но он,...
Question 26 (1 point) Saved Which best describes this transformation? Meo, CO Me Et Et NaoMe...
Question 26 (1 point) Saved Which best describes this transformation? Meo, CO Me Et Et NaoMe (2 equivalents) MeOH + H2NNH2 HNNH O 2 intermolecular nucleophilic acyl substitutions An intermolecular followed by intramolecular nucleophilic acyl substitutions O 2 intramolecular nucleophilic acyl substitutions O An intramolecular followed by intermolecular nucleophilic acyl substitutions Question 27 (1 point) What is the product of this reaction sequence? 1. NaOEt 2. BrCH_CH_CH_Br (0.5 molar equivalent) 3. NaOEt 4 H30*, Heat CH(COCH2CH3)2 -COH HOO.COM C.com HOC...
Please show detailed mechanism or explain in words. DQ25.11 Homework Draw the starting material: . SOCI,...
Please show detailed mechanism or explain in words.
DQ25.11 Homework Draw the starting material: . SOCI, DMF 2. (CH,CH),CuLi, THF Ph 3. H,O Hint: Note that organocuprates only add once to acyl chlorides. DQ25.12 Homework Draw the product of the following reactions: 0 O HN CH CI NaBH (1 equiv.) EtOH Hint: Think about the reactivity of the carboxylic acid derivatives. DQ25.13 Homework Draw the product of the following reaction. CH,NO cc, tBuOK, DMSO CCI Hint: The first step in...
Give the major organic product(s) of the following reaction. CH2CH2CH2Br (1 mole) Name CH3OH heat OH...
Give the major organic product(s) of the following reaction. CH2CH2CH2Br (1 mole) Name CH3OH heat OH Me Meo Y ome OMe Meo OMe OH 0 0 0 HO There is no reaction under these conditions or the correct product is not listed here. Give the major organic product of the following reaction. NaOme CH3CH Br | NaOH, H2O H30+ CH2OH heat heat heat HOX OH - Co₂H 0 0 Meo ОMe ОН Meo ОMe но тон Оснон There is no...
Provide the major product in the reaction involving carboxylic acid derivatives 1. DIBAH 2. H20 noty...
Provide the major product in the reaction involving carboxylic
acid derivatives
1. DIBAH 2. H20 noty nebo pyridine 1. LIAIH4 (excess) NH2 2. H20 MgBr 1. CO2 2. H2O HO H2SO4
1) Predict the major product in each of the following transformations. Show the mechanism. 2) Show...
1) Predict the major product in each of the following
transformations. Show the mechanism.
2) Show how you could synthesize the products below using a
Grignard reagent and appropriate electrophile by drawing the
overall balanced equation. Include the mechanism.
Predict the major product in each of the following transformations. No mechanisms are required for this question. [3 Marks] 1. CH,сн,МgBr (еxcess) 2. HС{aq) 1. PhMgBr (1 equiv.) 2. HCI(aq) ОН HO 1. CH2MgBr (2 equiv.) 2. HCl(aq) Н Show how...
4. Provide a complete curved-arrow mechanism for each of the following transformations involving conjugate addition Note...
4. Provide a complete curved-arrow mechanism for each of the following transformations involving conjugate addition Note that no stereochemistry is shown or implied in any of these reactions, and you may neglect it in your mechanisms as well. a. For this mechanism, you may assume that the reagent NaBH.CN behaves just like NaBHs, and that it preferentially performs 1,4-addition to unsaturated carbonyl compounds. O ! OME OMe H 1. NaOE, ETOH 2. NaBH CN, MOH oMe ОMe OME OME EtOXOE...
predict the products and indicate the relative stereochemistry for the following transformations. When necessary indicate the major product. Me 1. light 2. xylenes, heat Et (d) (4 points) CN xylen...
predict the products and indicate the relative stereochemistry
for the following transformations. When necessary indicate the
major product.
Me 1. light 2. xylenes, heat Et (d) (4 points) CN xylenes, heat Me 2. H30+, heat 3. Me OH Me Me cat p-TsOH, PhH reflux (d) (4 points) Meo OMe 1. AczO, pyridine Meo 2. HO HO OH
Me 1. light 2. xylenes, heat Et (d) (4 points) CN xylenes, heat Me 2. H30+, heat 3. Me OH Me Me cat...
Ochem 2 ch 19-20 Che Chemistry 2320 Ch 19 and 20-Carboxylic Acids and Derivatives (100 pts)...
Ochem 2 ch 19-20
Che Chemistry 2320 Ch 19 and 20-Carboxylic Acids and Derivatives (100 pts) Draw the major product for each of the following reactions. 7. a) 1.) Mg /Et O Br 2.) CO2 3.) Hg0 b) CN Но H2SO4 heat c) NaCN DMSO d) 1.) NaCN, DMSO 2.) H3O e) 1.) CH3OH, H2SO4 (cat) -cO-H 2.) LIAIH THF 3.) H20 OH Но- coH g) 1.) NaCN, DMSO 2.) H30 3.) HCI(aq), heat Page 4 of 6
PRACTICE the skill 19.8 Draw a plausible mechanism for each of the following transformations: EtO OEt MeO OMe H,SO excess EtOH [H2SO) excess MeOH -н.о H,O (b) (a) но Он M,SO но он H,SO -н,о O -н,о (d) (c) 19.9 The natural product frontalin is a pheromone isolated from the pine beetle Dendroctonus frontalis, a species that accounts for much of the diseased timber found in the northern hemisphere. The following reaction was a step in a synthesis of frontalin:...
Propose an efficient synthesis for each of the following transformations: O OH. - H20 1) [H*), HO 2) NaNH2 3) Eti 1) [H"), HO 2) Eti O H. - H2O 4) H30* OH-H20 1) [H"). HO 2) NaNH2 3) Eti 4) H30 O H. - H20 1) [H*). HO 2) NaNH2 3) H30 ОН 1) [н']), но 2) LiAIH, он, - H,0 он, - H,0 1) [н'], но 2) Н, 3) НО* 1) [н'], но 2) H2 он, -но он,...
Question 26 (1 point) Saved Which best describes this transformation? Meo, CO Me Et Et NaoMe (2 equivalents) MeOH + H2NNH2 HNNH O 2 intermolecular nucleophilic acyl substitutions An intermolecular followed by intramolecular nucleophilic acyl substitutions O 2 intramolecular nucleophilic acyl substitutions O An intramolecular followed by intermolecular nucleophilic acyl substitutions Question 27 (1 point) What is the product of this reaction sequence? 1. NaOEt 2. BrCH_CH_CH_Br (0.5 molar equivalent) 3. NaOEt 4 H30*, Heat CH(COCH2CH3)2 -COH HOO.COM C.com HOC...
Please show detailed mechanism or explain in words.
DQ25.11 Homework Draw the starting material: . SOCI, DMF 2. (CH,CH),CuLi, THF Ph 3. H,O Hint: Note that organocuprates only add once to acyl chlorides. DQ25.12 Homework Draw the product of the following reactions: 0 O HN CH CI NaBH (1 equiv.) EtOH Hint: Think about the reactivity of the carboxylic acid derivatives. DQ25.13 Homework Draw the product of the following reaction. CH,NO cc, tBuOK, DMSO CCI Hint: The first step in...
Give the major organic product(s) of the following reaction. CH2CH2CH2Br (1 mole) Name CH3OH heat OH Me Meo Y ome OMe Meo OMe OH 0 0 0 HO There is no reaction under these conditions or the correct product is not listed here. Give the major organic product of the following reaction. NaOme CH3CH Br | NaOH, H2O H30+ CH2OH heat heat heat HOX OH - Co₂H 0 0 Meo ОMe ОН Meo ОMe но тон Оснон There is no...
Provide the major product in the reaction involving carboxylic
acid derivatives
1. DIBAH 2. H20 noty nebo pyridine 1. LIAIH4 (excess) NH2 2. H20 MgBr 1. CO2 2. H2O HO H2SO4
1) Predict the major product in each of the following
transformations. Show the mechanism.
2) Show how you could synthesize the products below using a
Grignard reagent and appropriate electrophile by drawing the
overall balanced equation. Include the mechanism.
Predict the major product in each of the following transformations. No mechanisms are required for this question. [3 Marks] 1. CH,сн,МgBr (еxcess) 2. HС{aq) 1. PhMgBr (1 equiv.) 2. HCI(aq) ОН HO 1. CH2MgBr (2 equiv.) 2. HCl(aq) Н Show how...
4. Provide a complete curved-arrow mechanism for each of the following transformations involving conjugate addition Note that no stereochemistry is shown or implied in any of these reactions, and you may neglect it in your mechanisms as well. a. For this mechanism, you may assume that the reagent NaBH.CN behaves just like NaBHs, and that it preferentially performs 1,4-addition to unsaturated carbonyl compounds. O ! OME OMe H 1. NaOE, ETOH 2. NaBH CN, MOH oMe ОMe OME OME EtOXOE...
predict the products and indicate the relative stereochemistry
for the following transformations. When necessary indicate the
major product.
Me 1. light 2. xylenes, heat Et (d) (4 points) CN xylenes, heat Me 2. H30+, heat 3. Me OH Me Me cat p-TsOH, PhH reflux (d) (4 points) Meo OMe 1. AczO, pyridine Meo 2. HO HO OH
Me 1. light 2. xylenes, heat Et (d) (4 points) CN xylenes, heat Me 2. H30+, heat 3. Me OH Me Me cat...
Ochem 2 ch 19-20
Che Chemistry 2320 Ch 19 and 20-Carboxylic Acids and Derivatives (100 pts) Draw the major product for each of the following reactions. 7. a) 1.) Mg /Et O Br 2.) CO2 3.) Hg0 b) CN Но H2SO4 heat c) NaCN DMSO d) 1.) NaCN, DMSO 2.) H3O e) 1.) CH3OH, H2SO4 (cat) -cO-H 2.) LIAIH THF 3.) H20 OH Но- coH g) 1.) NaCN, DMSO 2.) H30 3.) HCI(aq), heat Page 4 of 6
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