Abstract
The stereochemistry of α-pipitzol ( 1a) has been established by transformation to cedrene ( 4) and by single crystal X-ray diffraction of α-pipitzol benzoate ( 1b). The stereochemistries of the related cedranolides β-pipitzol ( 2a), α-( 1c), β-( 2c) and γ-perezol ( 1d) are assigned from their respective ORD curves.
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