1. The first step involves 2. H-CI is polarised: H is the 3. The alkene behaves as a 4. In step 1, electron density flows from the bond breaks and forms 5. The intermediate species is a end, and Cl is the and HCI behaves as a to the end the H-CI
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- FUNCTIONAL GROUP SUBSTITUENT NAME -X (F, CI, Br, I) halo- -OH hydroxy- -SH mercapto- -OR alkoxy- -NH2 amino- -CHO formyl or alkanoyl -C=0 Oxo-or keto- -COOH carboxy- Alkoxycarbonyl Halocarbonyl -COOR -COX -CN cyano- -CONH2 carbamoyl-CH3 to Br- -H + Nal • product; Sy2 product of the reaction is : Аcetone H- -CH3 CH2 – CH3 CH3 CH3 CH3 CH3 it it -H H- -CH3 (d) -CH3 -H- (а) H• (Ъ) H- -CH3 -CH3 (с) H- CH -H- ČH2 – CH3 ČH2 – CH3 CH2 – CH3 CH2- CH3 2.6. The product(s) of the following reaction dd blow di CH2-CH2 excess HBr is/are: CH2 CH2 heat Od Al () (A od Ocf D (CHPPCOK (CHPCON G)D CH;CH2OCH,CH3 HO CH;CH,CH,CH,OH and CH;CH,CH2CH,Br II H t mol boumol toubong soinm od o CH2-CHBR HO CH2 CH2 BrCH-CH,CH-Cн,ОН and BrCH,CH,CH-CH,Br CityCHCH COM III IV A) I B) П O II D) IV E) None of these HO CH CH'OH
- SN7/ 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 KN3A chemist allows some pure (2S,3R)-3-bromo-2,3-diphenylpentane to react with a solution of sodium ethoxide(NaOCH2CH3) in ethanol. The products are two alkenes: A (cis-trans mixture) and B, a single pure isomer. Under thesame conditions, the reaction of (2S,3S)-3-bromo-2,3-diphenylpentane gives two alkenes, A (cis-trans mixture) and C.Upon catalytic hydrogenation, all three of these alkenes (A, B, and C) give 2,3-diphenylpentane. Determine the structuresof A, B, and C; give equations for their formation; and explain the stereospecificity of these reactionsStereochemistry: -CH3 -CH3 H3C- Br H3C Br IUPAC 313
- Kelerences Keview topic Draw a structural formula for the major product of the reaction shown. Cl2 H20 CH;CH2CH;CH=CHz • Show product stereochemistry IF the reactant alkene has both carbons of the double bond within a ring. Do not show stereochemistry in other cases. • If the reaction produces a racemic mixture, just draw one stereoisomer. 2reg 2reg M) ots 2reg pts 2req 1 pts 2req 1 pts 2reg ...1 pts ChemDoodle Previous Next> Save and Exit APR tv MacBook Air 80 DII DD F3 F4 FS F6 F7 F8 F10 F1 F12 #3 $ & + 3 4 6. 7 8 %3D dele E Y | { } P [ F G H. J K C V N M ? .. .. * C0 BChoose the best set of reagents/conditions to convert 1,3- butadiene to 1-bromo-2-butene. 11 P B C D Br (1 oquiv) 60°C Bra (1 equiv) -80°C HBr (1 equiv), H₂O₂ 60°C HBr (1 equiv), H₂O, -80°C DeThe major product of the following reaction is: CH;CH2S¯ Na + CH,CHCH,CH,Br DMSO CH, CH;CHCH=CH, CH; CH;C=CHCH3 CH, CH;CHCH,CH,SCH;CH3 CH, I II III
- 2) Predict the product for each Diels Alder reaction show below. Be certain to indicate stereochemistry as necessary. MeO گر S NC o=_ CN OEt A AWhen the alkene A was treated first with Hg(OAc)2 in MeOH and second with NaBH4 the product was the ether B. Using curved arrows please give the mechanism for the first step of (Hg(OAc)2 in MeOH) this reaction, including any regioselectivity or stereoselectivity. H3C 1. Hg(OAc)2, MeOH H3C O-CH3 =CH2 ✓ -CH3 H3C 2. NaBH H3C A BWhat is the structure of (1S.2R)-1-ethyl-2-methyl-1,2-epoxycyclohexane? II OH IV