Elimination reactions of cis-and trans-1-bromo-2-methylcyclohexanes with NaOEt in E1OH can give the same or different main product, 1-methylcyclohexene (1) or 3-methylcyclohexene (2). Which of (a)-(d) indicates the main products? Br Br NaOEt NaOEt EIOH Me ELOH Me Me Me trans cis 2 A. 1 both from the cis and trans substrate B. 2 both from the cis and trans substrates C. 1 from the cis and 2 from the trans substrate D. 2 from the cis and 1 from the trans substrate
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- Identify the reagents nacessary to accomplish cach of the following transformations. Choose the correct reagents from the following list: CH;CH;COCI, AICI, Fuming H3SO4 CH:CH;CI, AICla SOCI, Pyridine dilute H,S0. Zn(H, HCI, heat (CH:)2CHC, AICI; HNO, HaSO4 Enter the correct letter for sach stap of the reaction in the boxes below. (Reagents con be usad more than once) Step A: Step B: Step C:V. @Given the following mechanism fer me Y OCHS NaOH reaction show the detailed conversion of A to B •OCN3 CH3OH. OH (A) (B) c Ⓒ using the same detailed mechanism instead of cyclonexare ring as shown in product. B, propose and fer a product wil a cyclopentane ning instead of a cyclohexane viny. Ⓒ Exploumpand I with why campand (B) is preferred over the campanay campand with a cyclopentake ring..Dehydration of trans-2-methylcyclopentanol with POCl3 in pyridine yields predominantly 3-methylcyclopentene. Is the stereochemistry of this dehydration syn or anti? Can you suggest a reason for formation of the observed product? (Make molecular models!)
- What starting materials are needed to synthesize each azo compounds O2N H2N- -N=N- CI но -N=N- -CH3 I0 Fill in the reagent or starting material needed or product in each reaction a) CgH;CH;CH;CH2Br CGH;CH;CH;CH¿NH2 b) C,H;CH;CH;CH2CONH, CH,CH;CH;CH;NH2 HCI P-CH;C,H4NH2 NANO2 P-CH;C,H&NH2 HCI/H;0 P-CH3C,H4NH2 CH;COCISN7/ SN2| E1/EZunich reachan mecnanism do tre follawing reactions go tnrough 7) (R)2-bromopentanc reacts with CH3 OH at room temperature 2) (3R)-3-brom0-3,4-dimethylhexane is refl uxed with KOH 3) (A)-3-iodohexane is refl uxed with Heo 4) (S)4iodononane is refluxed with KN3By cyclocondensation of nitroalkenes with enolizable iso-cyanides in the presence of a base to give trisubstituted pyrrole : first step is Michael addition of isocyanide to the nitroalkene , followed by cyclization and elimination of HNO2. write the mechanism for that reaction - HNO2. ND2 R3 = = CO2Et ur Tos 3 N=c (Isocyanıde)
- What is the expected major product of reacting cyclohexane carbaldehyde jwith CH3NH2?Provide the structure of the product(s) with stereochemisty if appropriate. If multiple products indicate major product or if products are formed in equal amounts. If there is no reaction expected explain why. (a) OH HIO4 (the protecting group is remained) CHO H HOH2C OH (b) CHO -ОН NaCN # HO -H H -OH CH₂OH (c) CHO HO- -H HO -H NH₂OH 張一 H -OH H -OH CH₂OH i) Ba(OH)2 ii) MeOH, H₂SO4 NaOAc Ac₂0 NaOMe MeOHElimination reactions of cis- and trans-1-bromo-2-methylcyclohexanes with Eto in ETOH could potentially give the two products, 1-methylcyclohexene (1) or 3-methylcyclohexene (2). Which answer (a-d) indicates the major products for each reaction? Br „Br EtO Eto "CH3 ELOH `CH3 *CH ELOH "CH3 cis trans Select one: a. 2 from the cis and 1 from the trans substrate b. 2 both from the cis and trans substrates c. 1 both from the cis and trans substrates d. 1 from the cis and 2 from the trans substrate
- Clear my choice Which of the following is/are the expected product/s of the reaction of 2-pentanone (CH3COCH CHACH) with excess Bro, followed by OHT? O CHCOCHBRCH,CH3 BICH,COCH2CH;CHa O CHBr + CH,CH,CH,COO OCHBR + CH,CH,CH,COOH Which compound can undergo Cannizzaro reaction? CH,CHOWhich of the following reaction sequences would you use to convert 1- methylcyclohexene to the product 2 ? OH 2 O A) Oxymercuration-Demercuration O B) Hydroboration-Oxidation O C) Os04 / Pyridinc- NalHSO3 O D CH3CO3H- H30+For each compound, give the product(s) expected from (1) HgSO4>H2SO4@catalyzedhydration and (2) hydroboration–oxidation.(a) hex-1-yne (b) hex-2-yne(c) hex-3-yne