New methods and reagents in organic synthesis, 22,1 diphenyl phosphorazidate as a reagent for c-acylation of methyl isocyanoacetate with carboxylic acids
作者:Yasumasa Hamada、Takayuki Shioiri
DOI:10.1016/s0040-4039(00)86794-5
日期:1982.1
Diphenyl phosphorazidate (DPPA) can be used efficiently for the direct C-acylation of methyl isocyanoacetate with carboxylic acids, giving 4-methoxycarbonyloxazoles.
The invention relates to aminopyrazole derivatives of formula (I),
wherein A, E, R
1
and R
2
are as defined in the description, their preparation and their use as pharmaceutically active compounds.
[EN] PHENETHYLAMIDE DERIVATIVES AND THEIR HETEROCYCLIC ANALOGUES<br/>[FR] DÉRIVÉS DE PHÉNÉTHYLAMIDE ET LEURS ANALOGUES HÉTÉROCYCLIQUES
申请人:ACTELION PHARMACEUTICALS LTD
公开号:WO2010044054A1
公开(公告)日:2010-04-22
The invention relates to novel phenethylamide derivatives and their heterocyclic analogues of formula (I), wherein A, B, R1, R2 and R3 are as described in the application, and to the use of such compounds, or of pharmaceutically acceptable salts of such compounds, as medicaments, especially as orexin receptor antagonists.
Nickel-Catalyzed Decarboxylative Acylation of Heteroarenes by sp<sup>2</sup>CH Functionalization
作者:Ke Yang、Cheng Zhang、Peng Wang、Yan Zhang、Haibo Ge
DOI:10.1002/chem.201402516
日期:2014.6.10
azole derivatives with α‐oxoglyoxylic acids has been developed. This work represents the first example of decarboxylative cross‐coupling reactions, in a CH bond functionalization manner, through nickel catalysis, and tolerates various functional groups. Additionally, this approach provides an efficient access to azole ketones, an important structural motif in many medicinal compounds with a broad
Cobalt-Catalyzed Decarboxylative C–H (Hetero)Arylation for the Synthesis of Arylheteroarenes and Unsymmetrical Biheteroaryls
作者:Yanrong Li、Fen Qian、Mengshi Wang、Hongjian Lu、Guigen Li
DOI:10.1021/acs.orglett.7b02730
日期:2017.10.20
benzothiazoles or benzoxazoles is reported. This represents a first example of metal-catalyzed decarboxylative C–H heteroarylation of benzo-fused heterocycles. The transformation provides a convenientroute, with good yields and functional group tolerance, to various important arylheteroaryl and unsymmetrical biheteroaryl structural motifs.