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Structure elucidation of a hexahydrocannabinol derivative via 13C13C homonuclear correlation and 1H13C heteronuclear correlation with proton detection

Two‐dimensional carbon‐carbon correlated spectra (2D‐INADEQUATE) and proton‐carbon correlated spectra obtained with proton detection have been used to determine the absolute configuration and conformation of a hexahydrocannabinol derivative obtained with highly stereocontrolled synthesis. From the proton‐proton coupling constants the junction between rings B and C was found to be trans and the relative stereodisposition of C‐10a, C‐9 and C‐6a was deduced to be R.