Rhodium to the rescue: The formal aldol products of carboxamides (CONH2) were obtained by using a RhI(OR) (R=H, Me) catalyst under essentially neutral pH and ambient conditions. This novel aldol strategy is based on the catalytic aldol‐type reaction of nitriles, followed by hydration of the nitrile functionality (R1=aromatic or aliphatic, R2 and R3=H or alkyl; see scheme).
An unprecedented hydration/transfer hydrogenation tandem process for the catalytic conversion of β-ketonitriles into synthetically useful β-hydroxyamides in water has been developed, making use of the ruthenium(II) complex [RuCl2(η6-p-cymene)P(4-C6H4F)2Cl}] in combination with sodium formate.
对于β酮腈的催化转化成在水中合成有用β羟基酰胺前所未有的水合/转移氢化串联过程已经被开发,利用钌(II)络合物将[RuCl 2(η 6 - p -cymene)P (4-C 6 H 4 F)2 Cl}]与甲酸钠组合。
Pyridazine derivatives and their use as therapeutic agents
申请人:Chakka Nagasree
公开号:US20060009459A1
公开(公告)日:2006-01-12
Methods of treating an SCD-mediated disease or condition in a mammal, preferably a human, are disclosed, wherein the methods comprise administering to a mammal in need thereof a compound of formula (Ia):
where x, y, W, V, R
2
, R
3
, R
4
, R
5
, R
6
, R
6a
, R
7
, R
7a
, R
8
, R
8a
, R
9
and R
9a
are defined herein. Pharmaceutical compositions comprising the compounds of formula (I) are also disclosed.
PYRIDAZINE DERIVATIVES AND THEIR USE AS THERAPEUTIC AGENTS
申请人:Bilich Andreas
公开号:US20080280916A1
公开(公告)日:2008-11-13
Methods of treating an SCD-mediated skin disorder or condition in a mammal, preferably a human include administering to a mammal in need thereof a compound of formula (I):
where x, y, W, V, R
2
, R
3
, R
4
, R
5
, R
6
, R
6a
, R
7
, R
7a
, R
8
, R
8a
, R
9
and R
9a
are defined herein.
Although aqueousammonia is an inexpensive and readily available safe source of ammonia, there have been no successful studies on direct catalytic dehydrative amidations of carboxylic acids with aqueousammonia. In this study, we report a catalytic methodology for the synthesis of primaryamides through diboronic acid anhydride (DBAA)-catalyzed dehydrative condensation of carboxylic acids with aqueous