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Could someone help out with the second question. Its about reagents.

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  • Chemistry -

    It is diffiuclt to read.

    In the first one you need to cleave the double bond as it look like C=CH2 on the ring. In which case ozonolysis with O3 is easiest, but I can't make out the other reagnet/solvet. Then treat the cyclopentanone with PhMgBr so B looks best. Unusual set of steps as cyclopentanone is relatively inexpensive.

    In the second case you need to form the cis diol, so either A or B would achieve this, B can be more expensive.

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