Assign the glycosyl acceptor or donor identity to compound 2 and draw a plausible reaction mechanism with basic curly arrows for the reaction below. 2 OH AgOTf 3 anhydrous, CH2Cl2
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- The conversion of 3 alcohols into alkenes under acidic conditions involves two cationic intermediates. For each reaction, draw the complete mechanism using curved arrows.Treatment of -D-glucose with methanol in the presence of an acid catalyst converts it into a mixture of two compounds called methyl glucosides (Section 25.3A). In these representations, the six-membered rings are drawn as planar hexagons. (a) Propose a mechanism for this conversion and account for the fact that only the OH on carbon 1 is transformed into an OCH3 group. (b) Draw the more stable chair conformation for each product. (c) Which of the two products has the chair conformation of greater stability? Explain.Dehydration of 1,2,2-trimethylcyclohexanol with H2SO4 affords 1-tert-butylcyclopentene as a minor product. (a) Draw a stepwise mechanism that shows how this alkene is formed. (b) Draw other alkenes formed in this dehydration. At least one must contain a ve-membered ring.
- 9) Draw the conformer structure, Newman projection, before elimination and the elimination product of the following reaction: Br CH3ONA HDehydration of 1,2,2-trimethylcyclohexanol with H2SO4 affords 1-tertbutylcyclopentene as a minor product. (a) Draw a stepwise mechanism that shows how this alkene is formed. (b) Draw other alkenes formed in this dehydration. At least one must contain a five-membered ring.Which is the better method to synthesize n-propylbenzene? A) B) CH3CH₂-C-CI AICI; CH3CH₂-CH₂-CI AICI; CH₂-CH3 CH₂ Zn (Hg) HC1 CH₂-CH₂ CH₂ CH₂-CH
- Choose the struture of B-D-mannopyranose OH OH OH OH OH HO но Но но но HO OH OH OH OH [a] [b] [c] OH OH OH но HO но OH OH OH OH [d] [e]What is (are) the major organic product(s) obtained from the following reaction? Br2 O (2R,3R)-dibromobutane meso-2,3-dibromobutane O (2S,3S)-dibromobutane O Racemic mixtureDraw the organic products formed when cyclopentene is treated withfollowing reagent. [1] OsO4 + NMO; [2] NaHSO3, H2O
- Draw all stereoisomers formed in the reaction shown. Use wedges and dashes for tetrahedral stereogenic centers, if applicable. NH₂ HOACDraw all of the substitution and elimination products formed from thegiven alkyl halide with each reagent: (a) CH3OH; (b) KOH. Indicate thestereochemistry around the stereogenic centers present in the products,as well as the mechanism by which each product is formed.Dehydration of 1,2,2-trimethylcyclohexanol with H2SO4 affords 1-tertbutylcyclopentene as a minor product. (a) Draw a stepwise mechanismthat shows how this alkene is formed. (b) Draw other alkenes formed inthis dehydration. At least one must contain a five-membered ring.
