Stability of tetrahydrocannabinols II

Area of Science:

• Organic Chemistry
• Analytical Chemistry

Background:

• Cannabinoids, such as delta9-tetrahydrocannabinol, are complex molecules with diverse chemical properties.
• Understanding cannabinoid degradation pathways is crucial for pharmaceutical and forensic applications.

Purpose of the Study:

• To elucidate the biphasic degradation mechanisms of delta9-tetrahydrocannabinol in acidic and neutral solutions.
• To identify the degradation products and characterize the kinetics of these reactions.

Main Methods:

• Flame-ionization Gas-Liquid Chromatography (GLC) for monitoring degradation.
• Mass Spectrometry (MS) for compound identification.
• Comparison with authentic samples for verification.

Main Results:

• Acidic degradation produced delta8-tetrahydrocannabinol, cannabidiol, and other hydroxylated derivatives.
• Neutral conditions (pH > 4) yielded specific products (II and IV) via first-order kinetics.
• Acidic degradation of cannabidiol also yielded delta9-tetrahydrocannabinol and its degradation products.

Conclusions:

• The initial phase of acidic degradation involves solvolytic equilibria, while the second phase involves hydration of the double bond and ether cleavage.
• Cannabinol and hexahydrocannabinol can form through disproportionation catalyzed by various agents.