Intramolecular Fe(II)-Catalyzed N−O or N−N Bond Formation from Aryl Azides
作者:Benjamin J. Stokes、Carl V. Vogel、Linda K. Urnezis、Minjie Pan、Tom G. Driver
DOI:10.1021/ol101040p
日期:2010.6.18
Iron(II) bromide catalyzes the transformation of aryl and vinyl azides with ketone or methyl oxime substituents into 2,1-benzisoxazoles, indazoles, or pyrazoles through the formation of an N−O or N−N bond. This transformation tolerates a variety of different functional groups to facilitate access to a range of benzisoxazoles or indazoles. The unreactivity of the Z-methyloxime indicates that N-heterocycle
溴化铁 (II) 催化具有酮或甲基肟取代基的芳基和乙烯基叠氮化物通过形成 N-O 或 NN 键而转化为 2,1-苯并异恶唑、吲唑或吡唑。这种转化可耐受多种不同的官能团,以促进获得一系列苯并异恶唑或吲唑。 Z-甲基肟的不反应性表明,N-杂环的形成是通过酮或肟对活化的平面叠氮化铁络合物的亲核攻击而发生的。
A General One-Pot Synthesis of 2<i>H</i>
-Indazoles Using an Organophosphorus-Silane System
A simple and direct approach for the regioselective construction of the privileged 2H‐indazole scaffold is described. The developed one‐pot strategy involves phospholene‐mediated N−N bond formation to access 2H‐indazoles. The amount of organophosphorus reagent was minimized by recycling the phospholene oxide with organosilane reductants. Starting from functionalized 2‐nitrobenzaldehydes and primary
There are disclosed compound of Formula (I) or (II) wherein A
1
, A
2
, A
3
, A
4
and A
5
, which may be the same or different, represent N or CR
1
, R
9
represents -L-R
3
, in which L is a single bond or a linker group and R
3
represents hydrogen or a substituent and in addition, when an adjacent pair of A
1
-A
4
each represent CR
1
, then the adjacent carbon atoms, together with their substituents may form a ring B, when A
5
represents CR
1
, then A
5
and N—R
9
, together with their substituents may form a ring C, or a pharmaceutically acceptable salt thereof, in the manufacture of a medicament for the therapeutic and/or prophylactic treatment of Duchenne muscular dystrophy, Becker muscular dystrophy or cachexia.
Drug Combinations for the Treatment of Duchenne Muscular Dystrophy
申请人:Wynne Graham Michael
公开号:US20100168072A1
公开(公告)日:2010-07-01
Combinations comprising (or consisting essentially of) one or more compounds of the formula (I) or (II) with one or more ancillary compounds, to processes for preparing the combinations, and to various therapeutic uses of the combinations. Also provided are pharmaceutical compositions containing the combinations as well as a method of treatment of Duchenne muscular dystrophy, Becker muscular dystrophy or cachexia using the combinations.
Phosphine-Catalyzed Sequential [3 + 2]/[3 + 2] Annulation between Allenoates and Arylidenemalononitriles for the Enantioselective Construction of Bicyclo[3,3,0]octenes and Cyclopenta[<i>c</i>]quinolinones
作者:Nengzhong Wang、Yimin Lang、Junjie Wang、Zugen Wu、Yixin Lu
DOI:10.1021/acs.orglett.2c01352
日期:2022.5.27
A highly diastereo- and enantioselective phosphine-catalyzed sequential [3 + 2]/[3 + 2] annulation of allenoates with arylidenemalononitriles has been developed. This reaction allows for the facile construction of multifunctionalized cis-fused bicyclic[3,3,0]octene scaffolds, encompassing three consecutive stereogenic centers with one quaternary carbon center, in a one-step operation from readily available