Mass spectrometry of negative ions and the stereochemistry of organic compounds. IV. Acetates of epimeric diterpene glycols

Summary 1. It has been established that the fragmentation of the molecular negative ions of the diacetates of sclareol and of 13-episclareol takes place with the splitting out of the fragments Ac, OAc, CH₂CO, AcOH, CH₃, and CH=CH₂ without skeletal rearrangements.2. The relative yields of the negative ions formed depend on the stereochemistry of the molecules of the compounds investigated.Institute of Chemistry, Bashkir Branch of the Academy of Sciences of the USSR, Ufa. Institute of Chemistry, Academy of Sciences of the Moldavian SSR, Kishinev. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 454–457, July–August, 1978.