Selective isomerisation of prop-2-yn-1-ols into α,β-unsaturated aldehydes catalysed by Ru[η3-CH2C(Me)CH2]2(Ph 2PCH2CH2PPh2)
作者:Michel Picquet、Christian Bruneau、Pierre H. Dixneuf
DOI:10.1039/a701495c
日期:——
The complex
Ru[η
3
-CH
2
C(Me)CH
2
]
2
(Ph
2
PCH
2
CH
2
PPh
2
) is an efficient
catalyst precursor for the isomerisation of prop-2-yn-1-ols into
conjugated enals under mild conditions in the presence of benzoic acid
via (Z)-3-hydroxyprop-1-en-1-yl benzoates.
COMPOSITION FOR REMOVING SULFUR-CONTAINING COMPOUND
申请人:Kuraray Co., Ltd.
公开号:EP3476478A1
公开(公告)日:2019-05-01
Provided is a composition for removing a sulfur-containing compound present in liquid or vapor, the sulfur-containing compound being hydrogen sulfide, an -SH group-containing compound or a mixture thereof, the composition containing an α,β-unsaturated aldehyde represented by the following general formula (1) as an active ingredient:
wherein R1 and R2 each independently represent an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms or an aryl group having 6 to 12 carbon atoms, or are connected to each other to represent an alkylene group having 2 to 6 carbon atoms; and R3 represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, or is connected to R1 to represent an alkylene group having 2 to 6 carbon atoms.
Provided is a composition for removing iron sulfide, containing, as an active ingredient, an α,β-unsaturated aldehyde represented by the following general formula (1):
wherein R1 to R3 each independently represent a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or an aryl group having 6 to 12 carbon atoms, provided that R1 may be connected to R2 or R3, to constitute an alkylene group having 2 to 6 carbon atoms; and that R1 and R2 are not a hydrogen atom at the same time.
Composition for removing sulfur-containing compound
申请人:KURARAY CO., LTD.
公开号:US11291947B2
公开(公告)日:2022-04-05
Provided is a composition for removing a sulfur-containing compound present in liquid or vapor, the sulfur-containing compound being hydrogen sulfide, an —SH group-containing compound or a mixture thereof, the composition containing an α,β-unsaturated aldehyde represented by the following general formula (1) as an active ingredient;
wherein R1 and R2 each independently represent an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms or an aryl group having 6 to 12 carbon atoms, or are connected to each other to represent an alkylene group having 2 to 6 carbon atoms; and R3 represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, or is connected to R1 to represent an alkylene group having 2 to 6 carbon atoms.
Regiocontrolled Ruthenium-Catalyzed Isomerization of Propargyl Alcohols
作者:Edgar Haak、Steffen Skowaisa
DOI:10.1055/a-2288-3074
日期:——
ruthenium complex allows control of regioselectivity in the ruthenium-catalyzed isomerization of propargyl alcohols through the choice of additive. Thereby, both products of the Meyer–Schuster rearrangement and redox isomerization products are selectively accessible. In the presence of hydroxylamine-O-sulfonic acid, unsaturated nitriles are formed instead. The ruthenium catalyst is readily available and