作者:Sung-Eun Suh、Leah E. Nkulu、Shishi Lin、Shane W. Krska、Shannon S. Stahl
DOI:10.1039/d1sc02049h
日期:——
selectivity and good functional group tolerance, and uses commercially available catalyst components and reagents [CuOAc, 2,2′-bis(oxazoline) ligand, (trimethylsilyl)isocyanate, and N-fluorobenzenesulfonimide]. The isocyanate products may be used without isolation or purification in a subsequent coupling step with primary and secondary amines to afford hundreds of diverse ureas. These results provide
Copper-Catalyzed Cross-Coupling of Benzylic C–H Bonds and Azoles with Controlled <i>N</i>-Site Selectivity
作者:Si-Jie Chen、Dung L. Golden、Shane W. Krska、Shannon S. Stahl
DOI:10.1021/jacs.1c07117
日期:2021.9.15
ambident reactivity of many azoles, however, presents significant selectivity challenges. Here, we report a copper-catalyzed method that achieves site-selective cross-coupling of pyrazoles and other N–H heterocycles with substrates bearing (hetero)benzylic C–H bonds. Excellent N-site selectivity is achieved, with the preferred site controlled by the identity of co-catalytic additives. This cross-coupling
There are provided a fused pyrimidine compound having antagonistic activity against luteinizing hormone releasing hormone, and a medicine containing the compound. A luteinizing hormone releasing hormone antagonist containing a compound represented by the formula:
wherein R
1a
is a hydrocarbon group which may be substituted or a hydrogen atom,
ring A
a
is a 6-membered aromatic ring which may be further substituted,
ring B
a
is a homocyclic or heterocyclic ring which may be further substituted,
W
a
is an oxygen atom or a sulfur atom,
X
a1
and X
a2
, which may be identical or different, are each a hydrogen atom, a hydrocarbon group which may be substituted, or a heterocyclic group which may be substituted, or X
a1
and X
a2
together may form an oxygen atom, a sulfur atom or NR
3a
(wherein R
3a
is a hydrocarbon group which may be substituted or a hydrogen atom), and
Y
a
is C
1-6
alkylene which may be substituted or a bond, or a salt or prodrug thereof.
The present invention provides a compound represented by the formula (I) and a salt thereof
wherein: ring A is a 5-membered aromatic heterocycle optionally having substituent(s); R
1
is a hydrogen atom or a hydrocarbon group optionally having substituent(s); W is an oxygen atom or a sulfur atom; X
1
and X
2
may be the same or different and each is a hydrogen atom, a hydrocarbon group optionally having substituent(s) or a heterocyclic group, or, X
1
and X
2
in combination, optionally, form an oxygen atom, a sulfur atom or ═NR
2
; ring B is an aromatic ring optionally further having substituent(s); Y is a bond, C
1-6
alkylene C
2-6
alkenylene or C
2-6
alkynylene, optionally having substituent(s); and Z is —SO
n
R
3
or —COR
4
, which are useful as a pharmaceutical agent having GnRH antagonistic action.
GONADOTROPIN-RELEASING HORMONE RECEPTOR ANTAGONISTS AND METHODS RELATING THERETO
申请人:Ashweek Neil
公开号:US20100184741A1
公开(公告)日:2010-07-22
GnRH receptor antagonists are disclosed which have utility in the treatment of a variety of sex-hormone related conditions in both men and women. The compounds of this invention have the structure: wherein R
1a
, R
1b
, R
1c
, R
1d
, R
2
, R
2a
, and A are as defined herein, including stereoisomers, esters, solvates, and pharmaceutically acceptable salts thereof. Also disclosed are compositions containing a compound of this invention in combination with a pharmaceutically acceptable carrier, as well as methods relating to the use thereof for antagonizing gonadotropin-releasing hormone in a subject in need thereof.