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Which reaction sequence best accomplishes this transformation HCECH Br -Br (2R,3S)-2,3-dibromobutane A) 1. NaNH 2. CH,Br...
action sequence best accomplishes this transformation? CH, OCH Brz KOH CH, OH HO hv Brz CH, OH KOH Δ Br2 hv NaOCH, CCIA C) Br₂ HBr hv NaOCH, CCI, D) Br₂ hv
Check work HBe (2 eq) 1-CH,CH Br H-Cac- Na 2.NaNH, 3 (CH,), CBr Lindlar's catalyst Lindlar catalyst CH H20 H2, Pd C KMnO4 CH CH a
6. Propose a mechanism for this reaction: (E)-but-2-ene reacts with bromine (Bra) to form (2R,3S)-2,3-dibromobutane.
15. H.Pd 16. 17. 17. H3C 1) NaNH, 2) CH CH,Br 3) Lindlar's H2 18. 1) KMnO4(aq) warm, OH 2) H30+ 19. -CH3 excess Br? 20. 1) 1 equiv. HBr. peoxides 2) HCI
1. Which sequence of reagents will carry out the transformation shown below? 2. Give the correct IUPAC name for the compound depicted at the right. Include correct stereochemical designations. 8. Which sequence of reagents will carry out the transformation shown below? Whichequence of reagents will carry out the transformation shown bew? H3C-C= C-H - H₂C CH3 CH НАСС -С a. Hz, Lindlar's b. Na/NH, C. 1) NaNH/NH3; 2) CH2Br; 3) Na/NH d. 1) NaNH/NH3; 2) CH2Br; 3) H2, Lindlars e....
Which of the following is the correct structure of Compound A? 1) Br, CH C 2) 2.6 eq. NaNH. NH3の 3) H2. Lindlar's catalyst Compound A IV. Br V. OC. Il O D.I O E. IV
Which sequence of conditions best accomplishes the transformation below? Br steps Select one: O a. i) Mg; ii) CO2; iii) ETOH, H, heat o b.i) Mg; ii) SOCI; iii) EtOH, pyridine O c. i) CO2; ii) EtOH, H+ O d. i) Na2Cr207, H2SO4; ii) SOCI; ii) EtOH, pyridine
When the 2,7-dimethyl-4-octyne is treated with 2 moles (excess) HBr, the product(s) of the reaction is: CH-CH-CH-CH-CH-CH-CH-CH, B. CH3-CH-CH CH -CH2-CH-CH-CH; C CH-CH-CH2-C-CH3-CH-CH-CH н D. A mixture of a and b would be produced. A mixture of a, b, and e would be produced OB 0 0 0 Which of the following is the correct structure for 4-sec-butyl-1-heptyne? D. none of these OD What is the major organic product obtained from the following reaction? OH M CH,CH-CH-CH2=CH- 3 OH •...
age 7 19. The reaction of CH, CH, CCH, CH, with H,/Ni forms a. pentane. b. one particular chiral pentanol. c. an equimolecular mixture of two chiral pentanols . d. one achiral pentanol. e. no product. 20. The p-orbital of a methyl radical carbon, CH,, Contains how many electrons? a. 1 b. 2 e. 3 d. 4 e. 0 21. (2R, 35)-2,3-Dichlorobutane and (25, 3R) -2,3-dichlorobutane are: a. enantiomers b. diastereomers e. identical d. conformational isomers e. constitutional isomers 22....
Which conditions would be best for the preparation trans-2-methyl-3-hexene? a) 1) NaNH2 2) CH CH Br 3) Na, NH3 b) 1) NaNH2 2) (CH3)2CHB 3) Na, NH3 1) NaNH 2) CHCHBr 3) Hz, Lindlar Cat d ) 1) NaNH2 2) CH3CH2Br 3) Ha, Pt