Dehydrohalogenation of vinyl halides is essentially an E2 process. A stercochemical study revealed that (Z)-2-chloro-2-butendioic acid reacted 50 times faster than its stereoisomer. ÇOH 1. Na+ NH2 HO,C-C=C-CO,H 2. H,0 For the reaction below: CH,CH, 1. Na NH2 2. H,0*
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- Give the organic product formed by the following sequence of reactions (cyclopentene is starting compound). : OH Br CH3C-O-OH Na* NH, ? dilute H* A В (*±) (±) (t) A B.1. Give the reaction mechanism and name the products for the reaction of 2-bromobutane with a hot etbanelis solution of KOH (:OH-et). 2. Show the polarity on each haloalkane / alkyl halide. Show and name the mechanism of how the organic products are formed: a) CH3-CH2-CH2-I (g) +:CN- (ạg)à CH3-CH2-CH2-CN (I) + :I- (ag) b) CH3-CH2-CH2-Br (g)+:OH- (ag)à CH3-CH2-CH2-OH (I) + :Br- (ag)13:27 ll 4G O. The following presented reaction scheme lead to the synthesis of which major product from benzene, assuming separation of products is possible? soj 1. NaOH Cl Product - Product H,SO, 2. H,0 FeCl OA Meta-Chlorophenol O B. para-ChloroSulfenic acid OC. Para-Chlorophenol OD. Meta-chloroaniline Add a caption... > Status (Custom)
- 2) Predict the Product(s). Predict the major product(s) for the following reactions. но. OH H₂50, (cat.), heata. Enamines formed from the cyclic secondary amine pyrrolidine are important intermediates in the synthesis of 1,5-diketones. On the structures provided below, formation of an enamine from cyclopentanone and piperidine. draw the curved arrows for the reaction mechanism for the acetic acid-catalyzed H H H H eo N H H H3C- isod 1916w Proton Transfer (PT) 000 'H HO :01H SHO 6: HO H H 8²8-- H H 12.H food to shujounte sitt allarWm H OH M HO N* Predict the products and stereochemistry for the following reduction reaction NaBH4 (a) EtOH H2 Lindlar catalyst (b) 3-Hexyne (c) 3-Hexyne (d) CEC H2 Ni₂B (P-2) Na NH3
- 235L-6. For the following, a) predict the product and b) using curved arrows to show electron movement, provide a reasonable mechanism for the reaction. CI H2N, (-HС) 2 `NH2 ???Reactions: Provide the structure(s) of the expected maior oreanic productis. Show stereochemistry where needed and write NR if there is no reaction. H2SO4, 1000C heat a. OH OH 1. TSCI, Pyridine 2. NaCN, DMSO b. HO, PCC, DCM с. (CH3);COK d. t-BUOH Cl 1. CH3MGBT, Et,O 2. H;0* C.3. Show the mechanism for the acid catalyzed addition of H2O to the following ketone. OH H20 CH3 H* 4. The scheme below shows the reaction of a ketone, 2-propanone with methanol. OH :0 : || CH,-C-CH3 : ОН + H CH, c-CH3 CH;-C-CH3 N step 1 step 2 step 3 P CH,OH CH3 CH,OH step 4 + H OCH3 CH,-C-CH3 H - H,0 C-CH3 ÓCH, S CH; step 7 step 6 step 5 OCH3 i) Write the missing structures (N, O, Q and R) in the above reaction scheme. ii) Name the class of compounds P and S belong to? iii) This is an acid catalyzed reaction. What does this statement mean? iv) Draw the arrow diagram in step 6 to show how intermediate R is formed? Write the equation for this step ONLY. v) Steps 3 and 7 involve loss of a proton from the intermediate ions. Why is this step necessary?
- Od. 1.LIAIHA, 2. H,0' Benzene reacts with CH3CH2CI in the presence of AICI3 to form ethylbenzene (Friedel- Crafts alkylation) One of the followings is the reactive electrophile in this reaction Select one Oa AICI Ob CHCH.CI e CHCH d AIC TOSHIBA & 6 V 8 |o:ド Y I U P ق. F H i J J K V M. ALT GR CTRL1. Predict the product and write the systematic reaction mechanism for the reaction of benzoic acid with excess methanol in the presence of acid catalyst: HO. + CH;OH (еxcess) H,SO, (cat.) OCH3 + H,OCi Br 3-Bromo-4-chioro-2,5-dimethyhexans 5-lodo-2-hexene ESTION 15 CH;0 Na Which answer most accurately de nsider the elimination reaction 2-bromohex ane CH;OH O CH3CH,CH,CH=CHCH3 CH3CH2CH,CH;CH=CH, |An equimolar mixture of a and b. A mixture of the major product b with the minor product a. A mixture of the major product a with the minor product b. ESTION 16 cleophilic substitution and elimination reactions often compete with one another. In general, whic he E2 reaction over the S N2 reaction?