Transition-Metal-Free Cross-Coupling Reactions in Dynamic Thin Films To Access Pyrimidine and Quinoxaline Analogues
作者:Louisa A. Ho、Colin L. Raston、Keith A. Stubbs
DOI:10.1002/ejoc.201600830
日期:2016.12
The vortex fluidic device (VFD) is effective in modulating the synthesis of pyrimidine and quinoxaline-based compounds at room temperature and in high yield. The formation of the C–N bond occurs in the absence of a transition-metal catalyst, which avoids the contamination of the products with trace amounts of a transition metal. The systematic investigation of the operating parameters for the microfluidic
Cobalt-Catalyzed C-N Bond-Forming Reaction between N-Aromatic 2-Chlorides and Secondary Amines
作者:Gabriel Toma、Ken-ichi Fujita、Ryohei Yamaguchi
DOI:10.1002/ejoc.200900597
日期:2009.9
Secondaryamines react with N-aromatic 2-chlorides in the presence of a catalytic amount of cobalt chloride. When DPPP was added as ligand, the yield was further improved. The N-aromatic-containing tertiary amines formed are interesting due to their potential biological activity. This work represents the first cobalt-catalyzed approach to C–N bond formation involving N-aromatic 2-chlorides and secondary
Quinoxalines. XXVI. Reactions of 2-quinoxalinyl thiocyanate with nucleophiles.
作者:Chihoko IIJIMA、Tomiko KYO
DOI:10.1248/cpb.37.618
日期:——
2-Quinoxalinyl thiocyanate (1) possesses four electrophilic sites, i.e., 2-position, 3-position, sulfur and cyano carbon, to receive nucleophilic attack.Grignard reagents attacked preferentially the sulfur atom to give sulfides (8-12).These sulfides were readily oxidazed to sulfoxides (13-17) with sodium bromite in acetic acid.Hydroxide and ethoxide ions were found to attack preferably the cyano carbon to give thiol (2), while amines (butylamine, piperidine and morpholine) and ethyl cyanoacetate carbanion attacked the carbon at the 2-position to afford the corresponding ipso-substitution products (4-7).
Novel heteroaryl substituted piperidine derivatives which are L-CPT1 inhibitors
申请人:Ackermann Jean
公开号:US20070129544A1
公开(公告)日:2007-06-07
The invention is concerned with novel substituted piperidine derivatives of formula (I)
wherein R
1
, R
2
, R
3
, R
4
, R
5
, R
6
, R
7
and X are as defined in the description and in the claims, as well as physiologically acceptable salts and esters thereof. These compounds inhibit L-CPT1 and can be used as medicaments.
A mild and highly efficient catalytic amination procedure for chloroheteroarenes at ambient temperatureusing the Pd/PTABScatalyticsystem is reported. The protocol is selective for the amination of chloroheteroarenesusing secondary amines such as piperidine, pyrrolidine, and several others. The exceptional mildness of the developed protocol is beneficial for the synthesis of a crucial Buparlisib