Question

organic chemistry

3. The starting material below forms a six-membered cyclic hemiacetal in an aqueous solution: (pis) r , " a) Name the starting material b) Draw the mechanism of the reaction above. Note the role of H". c) How many stereoisomers are possible for the starting material? d) How many stereoisomers are possible for the cyclic hemiacetal? 4. Propose a mechanism for the formation of the cyclic acetal by treating acetone with ethylene glycol in the presence of an acid catalyst. Make sure that your mechanism is consistent with the fact that the oxygen atom of the water molecule is derived from the carbonyl oxygen of acetone (2 pts) = . HOVOH H2O

Answer 1

3. OH 6 5-hydroxyhexanal konu. Cign -- your 1 chiral centre so number of isomer = 1 x 2 = 2 u centre so number of somente d) ..0..OH You 2 dia centras unbelisoma = 242-4 2 chiral centre so number of isomer = 2 x 2 = 4 4. to the stree -> нолон