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Draw the structure of a compound with molecular C8H14 that reacts with one equivalent of H2 over Pd/C to form a meso compound.
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- (R)-2-butanol reacts with phosphorus tribromide to give A (C4H9Br). Treatment of A with sodium cyanide in DMF gives B (C5H9)N. B is optically active. Draw the structure of B. • Use the wedge/hash bond tools to indicate stereochemistry where it exists. Show stereochemistry in a meso compound. Sn [F ? ChemDoodleⓇA difficult problem in the synthesis of PGF2α is the introduction of the OH group at C15 in the desired configuration. a. Label this stereogenic center as R or S. b. A well-known synthesis of PGF2α involves reaction of A with Zn(BH4)2, a metal hydride reagent similar in reactivity to NaBH4, to form two isomeric products, B and C. Draw their structures and indicate their stereochemical relationship. d. Suggest a reagent to convert A to the single stereoisomer X.A difficult problem in the synthesis of PGF2α is the introduction of the OH group at C15 in the desired configuration. a. Label this stereogenic center as R or S. b. A well known synthesis of PGF2α involves reaction of A with Zn(BH4)2, a metal hydride reagent similar in reactivity to NaBH4, to form two isomeric products, B and C. Draw their structures and indicate their stereochemical relationship. c. Suggest a reagent to convert A to the single stereoisomer X.
- Atorvastatin (Lipitor) is used to decrease patient serum cholesterol levels. It works by inhibiting an enzyme called HMG-COA reductase. See"Connections to Biological Chemistry" one synthesis of atorvastatin that produces the desired single enantiomer of the final product, the following reagents are used. Draw the structures of synthetic intermedi- ates A and B. In -Cl NaCN НО. A B DMSO PyridineDHA is a fatty acid derived from sh oil and an abundant fatty acid in vertebrate brains. Hydrogenation of DHA forms docosanoic acid [CH3(CH2)20CO2H] and ozonolysis forms CH3CH2CHO, CH2(CHO)2 (ve equivalents), and HCOCH2CH2CO2H. What is the structure of DHA if all double bonds have the Z conguration?a Give the chemical structure of (2R.3S)-2,3-dibromopentane b. Identify the following pairs of compounds as either enantiomers, diastercomers, or identical CN .COOH он CCH но CCH and NC COOH Give the structure of any reagent that can be used to enantiomerically resolve R- and S- ibuprofen
- Draw the organic products formed when cyclopentene is treated withfollowing reagent. [1] OsO4 + NMO; [2] NaHSO3, H2ODraw the structure of a compound of molecular formula C6H10 that reacts with H2 in the presence of Pd-C but does not react with H2 in the presence of Lindlar catalyst.A difficult problem in the synthesis of PGF2α is the introduction of the OH group at C15 in the desired conguration.a. Label this stereogenic center as R or S.b. A well known synthesis of PGF2α involves reaction of A with Zn(BH4)2, a metal hydride reagent similar in reactivity to NaBH4, to form two isomeric products, B and C. Draw their structures and indicate their stereochemical relationship.c. Suggest a reagent to convert A to the single stereoisomer X.
- One compound that contributes to the “seashore smell” at beaches in Hawai‘i is dictyopterene D', a component of a brown edible seaweed called limu lipoa. Hydrogenation of dictyopterene D' with excess H2 in the presence of a Pd catalyst forms butylcycloheptane. Ozonolysis with O3 followed by (CH3)2S forms CH2(CHO)2, HCOCH2CH(CHO)2, and CH3CH2CHO. What are possible structures of dictyopterene D'?n. l. * O A نقطة واحدة Give a systemic name for each compound (a) OCH, إجابتك. نقطة واحدة Give a systemic name for each compound (b) CH3CH2-0-CH(CH3)2 إجابتك نقطة واحدة Give a systemic name for each compound (c) CICH2CH20CH3 إجابتك صفحة 5 من 6 التالي رجوع إرسال كلمات المرور عبر نماذج eال > Kf) Alkene X can be decomposed with hydrogen peroxide catalyzed by sodium tungstate to substance Q. This can be further degraded by iodoform reaction to substance R. Give the structures of substances Q and R. Xx S Na₂WO4 H₂O2 Q (C9H1603) 1: NaOH, 1₂ 2: H+ P₂O5 teplo - CHI3 R (C8H1404) P₂O5 teplo T g) The preparation of substance Q from substance X using hydrogen peroxide is a redox reaction. Identify the reductant and oxidant in this reaction, write the formal oxidation number to the atoms where it changes during the reaction and calculate the reaction. h) Substances Q and R undergo a reaction with phosphorous oxide under heating to form various products T and S. Determine the structure of substances T and S if you know their H NMR : 1H NMR (S): 2.2 (t, 2H); 1.8 (t, 2H); 1.3 (s, 6H). 1H NMR (T): 4.6 (d, 1H); 4.3 (d, 1H); 2.2 (t, 2H); 1.5 (t, 2H); 1.3 (s, 6H).