It is disclosed a process for the preparation of 2-(4-hydroxy-3-morfolinyl)-2-cycloesenone (BTG-1675A) comprising the steps of: i) reacting N-hydroxymorpholine with cycloesanone in the presence of an oxidation agent thus obtaining an isoxazolidine of Formula IV; and ii) converting the isoxazolidine of Formula IV into 2-(4-hydroxy-3-morfolinyl)-2-cycloesenone. Advantageously, the oxidation agent of the step i) is selected from the group consisting of metal oxides, esters and amides of the azodicarboxylic acid and the step ii) of conversion is carried out by basic catalysis followed by trituration in an aromatic hydrocarbon, preferably toluene. The process disclosed allows to obtain BTG-1675A according to the invention in an amount of hundreds of grams and on an industrial scale. The invention further concerns a new process for preparing hydroxylamines, particularly N-hydroxymorpholine, which is used in the process for preparing BTG-1675A.
本发明揭示了一种制备2-(
4-羟基-3-吗啉基)-2-
环己烯酮(BTG-1675A)的方法,包括以下步骤:i)在氧化剂的存在下,将N-羟基
吗啡与
环己烯酮反应,从而得到式IV的异氧
杂环化合物;ii)将式IV的异氧
杂环化合物转化为2-(
4-羟基-3-
吗啡基)-2-
环己烯酮。优选地,步骤i)中的氧化剂选自金属氧化物、偶氮二
甲酸的酯和酰胺的群组,而步骤ii)的转化是通过碱性催化后在
芳香烃中进行研磨,最好是
甲苯。本发明揭示的方法允许在工业规模上获得本发明的BTG-1675A数
百克。本发明还涉及一种制备
羟胺,特别是N-羟基
吗啡的新方法,该方法用于制备BTG-1675A的过程中。