PYRAZOLO[1,5a]PYRIMIDINE DERIVATIVES AS IRAK4 MODULATORS
申请人:Arora Nidhi
公开号:US20120015962A1
公开(公告)日:2012-01-19
Compounds of the formula I or II:
wherein X, m, Ar, R
1
and R
2
are as defined herein. The subject compounds are useful for treatment of IRAK-mediated conditions.
Selective Synthesis of Dihydrophenanthridine and Phenanthridine Derivatives from the Cascade Reactions of <i>o</i>-Arylanilines with Alkynoates through C–H/N–H/C–C Bond Cleavage
作者:Yuanshuang Xu、Caiyun Yu、Xinying Zhang、Xuesen Fan
DOI:10.1021/acs.joc.1c00256
日期:2021.4.16
unprecedented selective synthesis of dihydrophenanthridine and phenanthridinederivatives through the cascade reactions of 2-arylanilines with alkynoates is presented. Mechanistic studies showed that the formation of the dihydrophenanthridine scaffold involves an initial C(sp2)–H alkenylation of 2-arylaniline with alkynoate followed by an intramolecular aza-Michael addition. When this reaction is carried out
for the synthesis of fluorene and its derivatives starting from 2-iodobiphenyls and CH2Br2. A range of fluorene derivatives can be synthesized under relatively mild conditions. The reaction proceeds via a tandem palladium-catalyzed dual C–C bond formation sequence through the key dibenzopalladacyclopentadiene intermediates, which are obtained from 2-iodobiphenyls through palladium-catalyzed C–H activation
Synthesis of phenanthridine derivatives via cascade annulation of diaryliodonium salts and nitriles
作者:Jian Li、Hongni Wang、Jiangtao Sun、Yang Yang、Li Liu
DOI:10.1039/c4ob01504e
日期:——
A cascade coupling reaction toward a variety of phenanthridine derivatives has been developed. This cascade transformation proceeds via the copper-catalyzed coupling reaction of diaryliodonium salts and nitriles, and undergoes cyclization into the phenanthridine core.
Reaction pathways for arylcarbamoyl radicals and the cyclization of o-substituted phenylcarbamoyl radicals
作者:Rino Leardini、Antonio Tundo、Giuseppe Zanardi
DOI:10.1039/p19810003164
日期:——
in the aromatic ring. When the aryl group is phenyl or p-chlorophenyl the following reactions on carbamoyl radicals occur: (i) loss of hydrogen with formation of aryl isocyanates, whereas the loss of carbon monoxide leads to arylamines via arylaminyl radicals; (ii) dimerization to NN′-diaryloxamides; (iii) aromatic substitution on chlorbenzene leading to N-arylbenzamides (ipso-substitution) and N-