Question
Complete the synthesis of longifolene by providing possible reagents
OH Otos Dont worry about C-O selectivity here... Ma Mo
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Answer:

Ctb o Me 1. Pph HO 2. Nao Et E1OH 1 2 Me Pphs Mc 4 08. Ts CO OH OH OH OTOS bos 2. H,ot Me .Ne66/ EtOH 7 2. H301 MeNaoEA NaoEt EtoH MeI 10 Li AIH HCE Ph 11 CP

Mechanism:

I have numbered the steps with red ink,

Me phe Ph Me 11 NoOEd Oc Me O4 HpE Me HO O1H 2 Me Me C Pph Me Me Ph PG 3Os04 4 ,Me O. J40 Me Me Tasa OH OH -Ha OTOS Hs Me Me 0-ToS OTOS 0- Tos Tos Ha, sosaL H Hot 7 NaoEt 0t EteRa H,otNaOfA POEA Me Me Mef NaoE Ne Me Me-I Me Me 10 4/mc- 11 C=PPh3 Me Me Me

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Complete the synthesis of longifolene by providing possible reagents OH Otos Don't worry about C-O selectivity...
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