The present invention relates to a process for preparing tetrahydropyran-4-one represented by the formula (1):
which comprises reacting at least one kind of dihydropyran-4-one and pyran-4-one represented by the formula (2):
wherein represents a single bond or a double bond,
and hydrogen
(a) in the presence of a metal catalyst, in a mixed solvent of an aprotic solvent and an alcohol solvent, or
(b) in the presence of an anhydrous metal catalyst in which a hydrated metal catalyst is subjected to dehydration treatment, in a hydrophobic organic solvent.
本发明涉及一种制备式(1)所代表的四氢
吡喃-4-酮的工艺:
其中包括使至少一种二氢
吡喃-4-酮和式 (2) 所代表的
吡喃-4-酮反应:
其中代表单键或双键、
和氢
(a) 在
金属催化剂存在下,在钝溶剂和醇溶剂的混合溶剂中,或
(b) 在无
水金属催化剂存在下,在疏
水性有机溶剂中,对
水合
金属催化剂进行脱
水处理。