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All four stereoisomers of Δ9‐tetrahydrocannabinol (Δ9‐THC) were synthesized in concise fashion using stereodivergent dual catalysis. Thus, following identical synthetic sequences and applying identical reaction conditions to the same set of starting materials, selective access to the four stereoisomers of THC was achieved in five steps.
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Schafroth et al. (2014) studied this question.
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