Draw the products of the two step reaction sequence shown below. Use a dash and/or wedge bond to indicate the stereochemistry of substituents on asymmetric centers, where applicable OH PBr3 DMF H 0
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- Starting from the wedge-and-dash structure below (sighting down the indicated bond), rotate the back carbon to provide the structure in the conformation that will be capable of an E2 elimination. R/S stereochemistry is graded. # O H3C H Drawing > CI ||||| H Atoms, Bonds and Rings Tap a node to see sDraw the alkene that would react with the reagent given to account for the product formed. ? + H₂O ● You do not have to consider stereochemistry. You do not have to explicitly draw H atoms. • In cases where there is more than one answer, just draw one. 8 H₂SO4 // CH3 CH3CHCCH3 OH CH3 ? [F Previous Email InstructPlease fill in the missing reactants, reagents or products in the following reactions. Indicate relative stereochemistry where it is necessary CI j)
- Draw the organic product of the following reaction. CH3 m-CICgH,CO;H • Use the wedge/hash bond tools to indicate stereochemistry where it exists. • If the reaction produces a racemic mixture, just draw one stereoisomer. • If more than one product is possible, only draw the major product. opy asteDraw the major product of this reaction. Include stereochemistry if applicable. Use a dash or wedge bond to indicate the stereochemistry of substituents on asymmetric centers, where applicable. Ignore byproducts. Br CH3CO₂H Select to DrawDraw the product of the reaction shown below. Use a dash or wedge bond to indicate stereochemistry of substituents on asymmetric centers, Ignore inorganic byproducts. Illo. Av Drawing
- Draw the alkene that would react with the reagent given to account for the product formed. ? + + H₂O **** H₂S04 • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. • In cases where there is more than one answer, just draw one. CH3 CH3 CHCCH3 | | OH CH3 +1H3C Draw the alkene product of this Wittig reaction. Ph P CN ? • Use the wedge/hash bond tools to indicate stereochemistry where it exists. • Consider E/Z stereochemistry of alkenes. • Include H atoms at chiral centers only. • If a group is achiral, do not use wedged or hashed bonds on it. • Do not include lone pairs in your answer. They will not be considered in the grading.R'R?CHOH-CR°R* R'R?C=CR®R* What should orientation of each substituent in reactant to convert it into product alkene? What is importance of their specific orientation?
- a) H₂ Pd C-C -H and -H + A-B For the following reagents, indicate the following: a) what is added accross the double bond; b) is the addition stereoselective/stereospecific? If yes, do A and B add syn or anti?; c) draw the product, with relevant stereochemistry, when the reagent system shown is reacted with 1-methylcyclopentene. The answer to the first reagent system is shown below. (i) b) yes, syn addition | | -C-C- (achiral, stereochem. not observable) | I A B (ii) a) 1) 9-BBN 2) H₂O2, NaOH(aq) b)Draw the structure for an alkene that gives the following reaction product. CH3 HCI CH3CHCH2CHCH3 CI • Ignore alkene stereochemistry. •You do not have to explicitly draw H atoms. • In cases where there is more than one answer, just draw one. P. opy aste ChemDoodle"Consider the molecule 1-bromo-2-methylbutane. C3 and C4 should be drawn as Et as in theexample. This group is called an ethyl group and can be considered a sphere about twice the sizeof a methyl group. Draw the following Newman projections sighting down the C1C2 bond... a. The lowest potential energy conformation. b. The highest potential energy staggered conformation.