5. Show how the following synthethic transformations can be conducted in an efficient manner. start here...

 

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5. Show how the following synthethic transformations can be conducted in an efficient manner. start here OH (a) (b) OEt end here OH Ph Ph མི Me 6. (a) In the respective boxes, draw the primary organic structure present after each step for the reaction shown below. 1 2 3 1) NaOEt, 1.05 eq, rt ii 2) BrCH2CH2CH2CH2Br OEt 3) NaOEt, 1.05 eq, -20°C to rt 4) H3O+ 5) heat to 180°C 4 5 (b) Explain why the solution was cooled to -20°C before the addition of the second equivalent of sodium ethoxide. 5. Show how the following synthethic transformations can be conducted in an efficient manner. start here OH (a) (b) OEt end here OH Ph Ph མི Me 6. (a) In the respective boxes, draw the primary organic structure present after each step for the reaction shown below. 1 2 3 1) NaOEt, 1.05 eq, rt ii 2) BrCH2CH2CH2CH2Br OEt 3) NaOEt, 1.05 eq, -20°C to rt 4) H3O+ 5) heat to 180°C 4 5 (b) Explain why the solution was cooled to -20°C before the addition of the second equivalent of sodium ethoxide.