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

Abstract

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.