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Electron impact mass spectrometry of nuphar alkaloids. II—Thiohemiaminals
Author(s) -
Lalonde Robert T.,
Wong Chunfook,
Tsai Amy IM.
Publication year - 1976
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.1210110214
Subject(s) - moiety , chemistry , ion , hemiaminal , mass spectrometry , sulfur , stereochemistry , organic chemistry , chromatography
The appearance of m/e 228 and 176 ions, useful in ascertaining the presence of the hemiaminal hydroxyl, are discussed for six thiaspirane‐type hemiaminals isolated from Nuphar luteum and three epimeric pairs of α‐thiohemiaminals derived from (–)‐deoxynupharidine. Other groups of ions useful in ascertaining stereochemical differences of the sulfur moiety in α‐thiohemiaminals are discussed for the same compounds. One such group of ions is comprised of 248, 246 and 231; a second is 192 and 191.