Processes for preparing tetrahydropyran-4-one and pyran-4-one
申请人:Nishino Shigeyoshi
公开号:US20070078272A1
公开(公告)日:2007-04-05
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.
PROCESSES FOR PRODUCING TETRAHYDROPYRAN-4-ONE AND PYRAN-4-ONE
申请人:Ube Industries, Ltd.
公开号:EP1700853A1
公开(公告)日:2006-09-13
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.