Reanimation: Catalytically inactive π‐allyl ironcomplexes are “reanimated” upon addition of N‐heterocyclic carbene ligands such as 1,3‐dimesitylimidazolin‐2‐ylidene (SIMES). A comparison of stoichiometric and catalytic allylic alkylation reactions shows the π‐allyl mechanism to be active in this catalytic system.
Doll, Chemisches Zentralblatt, 1918, vol. 89, # II, p. 707
作者:Doll
DOI:——
日期:——
Wahl; Doll, Bulletin de la Societe Chimique de France, 1913, vol. <4> 13, p. 338
作者:Wahl、Doll
DOI:——
日期:——
Benzylidene-Alpha-Dicarbonyl Compounds as Novel Uv Absorbers
申请人:Koch Oskar
公开号:US20080050319A1
公开(公告)日:2008-02-28
The use of a compound of the formula
wherein
R
1
-R
3
independently of one another are hydrogen, C
1
-C
8
-alkyl or C
1
-C
8
-alkoxy,
R
4
is COR, CO
2
R, CONR
2
, where R is C
1
-C
8
-alkyl or C
3
-C
8
-cycloalkyl
R
5
is H or C
1
-C
8
-alkyl,
R
6
is aryl, aryl substituted by up to three C
1
-C
8
-alkyl- or C
1
-C
8
-alkoxy, or C
3
-C
8
-cycloalkyl
as UV filters in cosmetic formulations, in particular in combination with UV filters from the group consisting of methoxycinnamate derivatives and/or dibenzoylmethane derivatives, with the proviso that R
5
is H if R
4
is COR, is described.