| Abstrakt: |
1.The mass spectra of four cis-trans-isomers of the sclaerol oxide series (I)–(IV), ambreinolide and its cis-A/B-isomer, as well as their bicyclic analogs: cis- and trans-2,5, 5, 1a-hexamethyl-1a, 4a, 5, 6, 7, 8-hexahydro-? chromene, cis- and trans- ?8-4, 4, 8, 10-tetramethyl-9-(ß-carboxyethyl)octaline, and cis- and trans-?8-4, 4, 8, 10-tetramethyl-9-(3'-ketobutyl-1')octaline were studied.2.In the case of cis- and trans-isomers differing in the type of joining of the carbocyclic rings, the intensity of the peaks due to elimination of a CH3 from the molecular ion or bicyclic fragment containing the A and B rings is greater in the case of cis-compounds.3.The mass spectra of cis- and trans-joined compounds, one of the rings of which contained a heteroatom (III) and (IV), (VII)–(X), in contrast to their carbocyclic analogs, differ substantially from one another also in the intensity of the peaks of the ions due to cleavage of the bond at the site of joining of the rings. |
Full text from SpringerLink