DIALKOXYALKENYL ALKOXYMETHYL ETHER COMPOUND AND A PROCESS FOR PREPARING A TERMINAL CONJUGATED ALKADIENAL COMPOUND FROM THE SAME
申请人:Shin-Etsu Chemical Co., Ltd.
公开号:US20220106247A1
公开(公告)日:2022-04-07
The present invention provides a process for preparing a terminal conjugated alkadienal compound of the following general formula (5):
CH
2
═CHCH═CH(CH
2
)
a
CHO (5)
wherein “a” represents an integer of 1 to 15, from a dialkoxyalkenyl alkoxymethyl ether compound of the following general formula (1):
R
1
CH
2
OCH
2
OCH
2
CH
2
CH═CH(CH
2
)
a
CH(OR
2
)(OR
3
) (1)
wherein R
1
represents a hydrogen atom, an n-alkyl group having 1 to 9 carbon atoms, or a phenyl group, R
2
and R
3
represent, independently of each other, a monovalent hydrocarbon group having 1 to 15 carbon atoms, or R
2
and R
3
may form together a divalent hydrocarbon group, R
2
-R
3
, having 2 to 10 carbon atoms, and “a” is as defined above.
@ A process for preparing bis-α-keto-carboxylic acids by reacting a dihaloalkane in a liquid solvent medium with carbon monoxide at elevated temperature and pressure in the presence of a catalytic amount of a metal carbonyl compound and an alkali or an alkaline earth metal inorganic base.
A charge-controlling agent comprising a polyamine having a repeating structure represented by the following general formula (I):
The symbols in the formula are defined in the specification. Also disclosed is a toner using the charge-controlling agent.
Dialkoxyalkenyl alkoxymethyl ether compound and a process for preparing a terminal conjugated alkadienal compound from the same
申请人:Shin-Etsu Chemical Co., Ltd.
公开号:US11414368B2
公开(公告)日:2022-08-16
The present invention provides a process for preparing a terminal conjugated alkadienal compound of the following general formula (5):
CH2═CHCH═CH(CH2)aCHO (5)
wherein “a” represents an integer of 1 to 15, from a dialkoxyalkenyl alkoxymethyl ether compound of the following general formula (1):
R1CH2OCH2OCH2CH2CH═CH(CH2)aCH(OR2)(OR3) (1)
wherein R1 represents a hydrogen atom, an n-alkyl group having 1 to 9 carbon atoms, or a phenyl group, R2 and R3 represent, independently of each other, a monovalent hydrocarbon group having 1 to 15 carbon atoms, or R2 and R3 may form together a divalent hydrocarbon group, R2-R3, having 2 to 10 carbon atoms, and “a” is as defined above.