Ligand‐Controlled Regiodivergence in Nickel‐Catalyzed Hydroarylation and Hydroalkenylation of Alkenyl Carboxylic Acids**
作者:Zi‐Qi Li、Yue Fu、Ruohan Deng、Van T. Tran、Yang Gao、Peng Liu、Keary M. Engle
DOI:10.1002/anie.202010840
日期:2020.12.14
the ligand environment around the metal center dictates the regiochemical outcome. Markovnikov hydrofunctionalization products are obtained under mild ligand‐free conditions, with up to 99 % yield and >20:1 selectivity. Alternatively, anti‐Markovnikov products can be accessed with a novel 4,4‐disubstituted Pyrox ligand in excellent yield and >20:1 selectivity. Both electronic and stericeffects on the
Enantioselective [3+2] coupling of cyclic enamides with quinonemonoimines was realised using a chiralphosphoricacid as a catalyst. This transformation allowed for the synthesis of highly enantioenriched polycyclic 2,3-dihydrobenzofurans...
Benzo-fused lactams that promote the release of growth hormone
申请人:Merck & Co., Inc.
公开号:US05206235A1
公开(公告)日:1993-04-27
There are disclosed certain novel compounds identified as benzo-fused lactams which promote the release of growth hormone in humans and animals. This property can be utilized to promote the growth of food animals to render the production of edible meat products more efficient, and in humans, to increase the stature of those afflicted with a lack of a normal secretion of natural growth hormone. Growth promoting compositions containing such benzo-fused lactams as the active ingredient thereof are also disclosed.
Pyrazolecarboxylic acid tricyclic derivatives, preparation and pharmaceutical compositions containing same
申请人:Barth Francis
公开号:US06906080B1
公开(公告)日:2005-06-14
The subject of the invention is tricyclic derivatives of pyrazolecarboxylic acid of formula:
in which R
1
represents a C
3
-C
15
carboxyl radical or an NR
2
R
3
group. The invention also relates to the method for preparing the compounds of formula (I), pharmaceutical compositions containing them. The compounds of formula (I) are active on cannabinoid CB
1
receptors.