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Cyclic organophosphorus compounds: XVII —the mass spectra of some 5,5‐dimethyl‐perhydro‐1,3,2‐oxazaphosph(v)orines
Author(s) -
Edmundson R. S.
Publication year - 1982
Publication title -
organic mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0030-493X
DOI - 10.1002/oms.1210171106
Subject(s) - chemistry , ring (chemistry) , mass spectrum , medicinal chemistry , thiol , hydrogen , ion , organic chemistry
The electron impact mass spectra of six 5,5‐dimethyl and eleven 3,5,5‐trimethyl‐perhydro‐1,3,2‐oxazaphosphorine 2‐oxides and 2‐sulphides are reported and compared with those of analogous 5,5‐dimethyl‐1,3,2‐dioxaphosph(v) orinans. Compounds of the 3,5,5‐trimethyl series produce an important ion at m / z 44 which clearly distinguishes them from the 5,5‐dimethyl series. The 2‐sulphides are characterized by loss of thiol radical rather than of sulphur; in the case of 2‐cyclohexylamino‐3,5,5‐trimethyl‐perhydro‐1,3,2‐oxazaphosphorine 2‐sulphide at least, the thiol hydrogen is derived from the oxazaphosphorine ring NCH 2 group. Fission of the oxazaphosphorine ring occurs largely, but apparently not exclusively, at the POC linkages.