More specifically, the present invention relates to a process for the preparation of substantially optically pure cishexahydrodibenzofuran compounds including at least two chiral fused ring centers which comprises the acidic catalyzed stereospecific ring closure by {TAIL ~ the intra molecular inversion} of a gamma, i.e. 2, {HEAD ~ carbon atom} of a 2 phenol 
More specifically , the present invention relates to a process for the preparation of substantially optically pure cishexahydrodibenzofuran compounds including at least two chiral fused ring centers which comprises the acidic catalyzed stereospecific ring closure by { TAIL ~ the intra molecular inversion } of a gamma , i.e. 2 , { HEAD ~ carbon atom } of a 2 phenol
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