Q12. (bremeetblbenzene 1 ydergeesan elimination following an E1 mechanism. Fill in the following synthetic scheme by drawing the structure of intermediate 2 and product 3. The chemical formula of product 3 is provided as guidance.
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- What compound is the major product of the reaction sequence shown below? (1) KCN ethanol Он (A) NH2 (B) (2) LIAIH, (xS)/ether (3) dil. H* H;O он NH2 OH (C) (D) Compound C Compound D )Compound A O Compound BQ12. (1-bromoethyl)benzene 1 udergoes an elimination following an E1 mechanism. Fill in the following synthetic scheme by drawing the structure of intermediate 2 and product 3. The chemical formula of product 3 is provided as guidance. CH; RDS Br C3Hg E1 2 3(b) How can be prepared from OEt CO,Et and at EtO OEt EtO2C 95 °C ? Provide the mechanism.
- (c) What sequence of reactions could be used to ensure the following transformation? ? HComplete the following reaction scheme. Give all product(s) and indicate major or minor and any relevant stereochemistry (d) dil HCl (e) ОН Conc H2SO4 heat (f) HBrWhen norbornene undergoes hydroboration-oxidation, a mixture of two stereoisomers is produced in a roughly 6:1 ratio. (a) Draw both of these isomeric products. (b) Which product is favored? Hint: You should build a model of norbornene and consider the transition state leading to each product. 1. BH3 THF ? 2. H2O2, NaOH, H,O Norbornene
- Which is the major substitution product of the reaction shown? (A) OEt (C) (E) no reaction Br NaOEt © 2019 ProtonGuru.com (B) (D) OEt (F) a mixture of more than oneDraw the mechanism and predict the major product for each of the following reactions. (a) (b) O (c) NABH4 NABH4. 1. LIAIH4, Et,O ? CH;OH ? 2. H2SO4, H2O mOCH3 CH;OHQ12. (Ikremostby)benzene 1 ygdergoes an elimination following an E1 mechanism. Fill in the following synthetic scheme by drawing the structure of intermediate 2 and product 3. The chemical formula of product 3 is provided as guidance. CH3 RDS Br C3H3 Е1 1 3
- .55 Predict the major organic product and draw the complete, detailed mechanism for each of the following reactions. (a) (b) (c) CH;CH,OH (excess) CH,OH (еxcess) ? H,SO4 НО HO H. H2SO4 H2SO4 (d) (e) НО SH НО OH ? ? H2SO4 H2SO43) Please draw the structures that correspond to omitted structure for each of the following synthetic sequences. HO Cro3 Cro3 (a) Product `OH Product H,0 HO PCC Cl РСС (b) Product (e) Product OH HO РСС NABHA (f) Starting Material (c) Product OH ELOHFor each reaction, draw the complete mechanism and the major organic product(s), paying attention to stereochemistry. (a) (b) OH LOH (еxcess) ? ? CH,Cl2 CH2CI2