Multi-step synthesis of the carbonyl compound.
1.Constructing the carbon framework or skeleton of the desired molecule.
2.Introducing, removing or transforming functional groups in a fashion that achieves the functionality of the desired compound.
3.Exercising selective stereocontrol at all stages in which centers of stereoisomerism are created or influenced. These are not discrete independent tasks to be attacked and solved in turn, but must be integrated and correlated in an overall plan.
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