Some of the most important building blocks for synthesis are very simple molecules. Although cyclopentanone and cyclohexanone are readily available commercially, an understanding of how they can be made from simpler molecules is instructive. The following are possible retrosynthetic analyses (Section 8-9) for both of these ketones. Using them as a guide, write out a synthesis of each ketone from the indicated starting materials. 

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BRCH,CCH3 CH;CCH3 HÖCH,CH,CH; + Cyclopentanone HÖCH,COCH,CH3 CH;COCH,CH3 CH,=CHCH; CH;CCH3 A HÖCH,CH,CH,CCH3 + Cyclohexanone НССН-СОСH,CH CH;COCH,CH3