An effective palladium-catalyzed oxidative C–H/C–H cross-coupling of imidazopyridines with azoles using air as the oxidant has been developed. This protocol provides a straightforward and operationally simple method for the synthesis of 3-azolyl-imidazopyridines in moderate to good yields and with good functional group tolerance. The biological evaluation revealed that the newly synthesized compounds
[EN] 6-AMINO-PYRIMIDINE-4-CARBOXAMIDE DERIVATIVES AND RELATED COMPOUNDS WHICH BIND TO THE SPHINGOSINE 1-PHOSPHATE (S1P) RECEPTOR FOR THE TREATMENT OF MULTIPLE SCLEROSIS<br/>[FR] DÉRIVÉS DE 6-AMINO-PYRIMIDINE-4-CARBOXAMIDE ET COMPOSÉS ASSOCIÉS QUI SE FIXENT AU RÉCEPTEUR DE SPHINGOSINE-1-PHOSPHATE (S1P) DANS LE TRAITEMENT DE LA SCLÉROSE EN PLAQUES
申请人:SERONO LAB
公开号:WO2009019167A1
公开(公告)日:2009-02-12
The invention relates to compounds of formula (I): wherein X, W, Q, R, R1 and R2 have the meanings given in claim 1. The compounds are useful e.g. in the treatment of autoimmune disorders, such as multiple sclerosis.
Photoelectrochemical cross-dehydrogenative coupling of benzothiazoles with strong aliphatic C–H bonds
作者:Luca Capaldo、Lorenzo L. Quadri、Daniele Merli、Davide Ravelli
DOI:10.1039/d1cc01012c
日期:——
cross-dehydrogenative coupling of unactivated aliphatic hydrogen donors (e.g. alkanes) with benzothiazoles is reported. We used tetrabutylammonium decatungstate as the photocatalyst to activate strong C(sp3)–H bonds in the chosen substrates, while electrochemistry scavenged the extra electrons.
Synthesis of benzothiazoles from 2-aminobenzenethiols in the presence of a reusable polythiazolium precatalyst under atmospheric pressure of carbon dioxide
作者:Supill Chun、Sabyuk Yang、Young Keun Chung
DOI:10.1016/j.tet.2017.05.003
日期:2017.6
Synthesis of benzothiazoles from 2-aminobenzenethiols and carbondioxide was carried out using poly(3,4-dimethyl-5-vinylthiazolium) iodide as a precatalyst to in situ generation of NHCs by deprotonation. The reaction was successfully carried out under mild conditions (1 atm of CO2 and 60–70 °C) with a broad substrate scope and functional group tolerance. The precatalyst salt was recovered and reused
TBHP-mediated oxidative thiolation of an sp3 C–H bond adjacent to a nitrogen atom in an amide
作者:Ri-Yuan Tang、Ye-Xiang Xie、Yi-Li Xie、Jian-Nan Xiang、Jin-Heng Li
DOI:10.1039/c1cc15397h
日期:——
The first example of molecular sieve-promoted TBHP-mediated direct oxidative thiolation of an sp3 CâH bond adjacent to a nitrogen atom with disulfides under metal-free conditions, which allows for preparation of numerous S,N-containing compounds, is presented. Moreover, diverse benzothiazoles and a fipronil analog can be synthesized through this strategy.