Cover.doc
1) Review the hydroboration-oxidation reaction from your Organic I experience. Draw tripropylborane and 1-propanol, and show partial charges to illustrate umpolung (reversal of polarity) on converting a trialkylborane to an alcohol.
2) Draw a stepwise mechanism for the following transformation, using curved arrows to show the movement of electrons at each step.
xylan --> D-xylose
(HCl, H2O, Heat over the reaction arrow)