Question: b. The D-ketose, shown in Figure 3, can react with sodium borohydride to give a mixture of products. CH2OH FO HOGH 1. NaBH4 HO -

b. The D-ketose, shown in Figure 3, can react with sodium borohydride to give a mixture of products. CH2OH FO HOGH 1. NaBH4 HO - 2. HCI, H20 CH2OH Figure 3 (i) Draw the structure of the products you would expect from the reaction shown in Figure 3. [2 marks] (ii) Draw out and discuss the mechanism for the reaction shown in Figure 3. [6 marks] (iii) The D-ketose in Figure 3 can cyclise to give both the furanose and pyranose forms. Draw a Fischer projection and Haworth projection for a cyclic form (either a or form accepted) of the resulting cyclic D-furanose. [5 marks]
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