Synthesis and Mass Spectra of Sugar Thioimidazole Derivatives
摘要:
The reaction of 1-halogenophenylglucofuranoimidazolidine-2-thiones (1, 2) with benzyl chloride gives bicyclic S-benzylthioimidazolines (3, 4) or tetrahydroxybutyl S-benzylthioimidazoles (7, 8) depending on the presence or absence of sodium hydrogencarbonate. In the latter case a partial desulphuration takes place. The electron impact mass spectra of compounds 1-4, 7, 8, and of the acetyl derivatives 5, 6, 9, and 10 are examined. The primary fragmentations and two fragmentation pathways were observed, the importance of which depends on the cyclic character of the molecule and of the nature of the substituent (OH or OAc).
Acylation of glycofurano[2,1-d]imidazolidine-2-thiones: A structural revision
作者:Martin Avalos Gonzalez、Jose L. Jimenez Requejo、Juan C. Palacios Albarran、Maria D. Ramos Montero、Juan A. Galbis Perez
DOI:10.1016/0008-6215(87)84005-3
日期:1987.3
Abstract Acetylation of glycofurano[2,1- d ]imidazolidine-2-thiones leads to the O -acetylated or N -acetylated, O -acetylated glycofurano[2,1- d ]imidazolidine-2-thiones depending on the reaction conditions. The position of acetylation on the imidazolidine-2-thione ring was demonstrated by spectroscopic data and by transformation of CSaCO groups. The formation of a glycofuranoimidazolidine-2-thione