Precursors for fragrant ketones and fragrant aldehydes
申请人:Givaudan SA
公开号:EP1262473A1
公开(公告)日:2002-12-04
The present invention refers to fragrance precursors of formula I
for a fragrant ketone of formula II
and one or more fragrant aldehydes or ketones of formula III and IV,
These fragrance precursors are useful in perfumery, especially in the fine and functional perfumery.
A highly anti‐Markovnikov selective oxidation of alkenes based on in situ generated hypoiodite catalysis in aqueous micellar media under mild conditions has been described. This novel catalytic system realizes an efficient synthesis of aldehydes from alkenes in an economically viable and environmentally safe fashion. The preliminary mechanistic studies suggest that the reaction proceeds via tandem
Novel Anti-Markovnikov Regioselectivity in the Wacker Reaction of Styrenes
作者:Joseph A. Wright、Matthew J. Gaunt、Jonathan B. Spencer
DOI:10.1002/chem.200400644
日期:2006.1.11
The Wackerreaction is one of the longest known palladium-catalysed organic transformations, and in the vast majority of cases proceeds with Markovnikov regioselectivity. Palladium(II)-mediated oxidation of styrenes was examined and in the absence of reoxidants was found to proceed in an anti-Markovnikov sense, giving aldehydes. Studies on the mechanism of this unusual transformation were carried out
The present invention provides a fragrance precursor of formula I:
1
that is capable of forming a fragrant ketone of formula II:
2
and a fragrant lactone of formula III:
3
LOXOPROFEN DERIVATIVE AND PHARMACEUTICAL PREPARATION CONTAINING THE SAME
申请人:Mizushima Toru
公开号:US20120016158A1
公开(公告)日:2012-01-19
There is provided a novel loxoprofen derivative that has no side effect such as a gastrointestinal disorder and also has excellent anti-inflammatory and analgesic effects and is represented by the following formula (I) or (II):
(wherein R
1
and R
2
each represent a halogen atom or a substituted or unsubstituted phenyl group)
or a pharmacologically acceptable salt thereof. In the derivative, the halogen atom is selected from a chlorine atom, a bromine atom, a fluorine atom, and an iodine atom, and a substituent of the substituted phenyl group is a halogen atom, a hydroxyl group, a substituted or unsubstituted lower alkyl group, a lower alkylthio group, a lower alkoxy group, a nitro group, an amino group, or a carboxyl group.