Photo-induced Carboiodination: A Simple Way to Synthesize Functionalized Dihydrobenzofurans and Indolines
作者:Xiaobo Yang、Wenbo Liu、Lu Li、Wei Wei、Chao-Jun Li
DOI:10.1002/chem.201603608
日期:2016.10.17
readily available and cheap aryl bromides and sodium iodide as the starting materials to synthesize valuable functionalized dihydrobenzofurans and indolines in good to excellent yields with broad functional‐group compatibility. As examples to demonstrate the utility of this protocol, gram‐scale reactions and further transformations of the products were accomplished towards the synthesis of bioactive
HALOGEN MIGRATION AND ELIMINATION IN THE CLAISEN REARRANGEMENT OF ALLYL 2,6-DIHALOPHENYL ETHERS
作者:E. Piers、R. K. Brown
DOI:10.1139/v63-430
日期:1963.12.1
A study has been made of some factors affecting the migration or elimination of halogen in the Claisenrearrangement of allyl 2,6-dihalophenyl ethers.In the thermal rearrangement of allyl 2,6-dichlorophenyl ether, carried out in a number of solvents of different dielectric constant, halogen migration proceeds somewhat better in highly polar solvents. However, a competitive reduction to the monohalogenated
Azidosubstituted arylboronic acids: synthesis and Suzuki–Miyaura cross-coupling reactions
作者:Sergey I. Sviridov、Andrei A. Vasil'ev、Natalia L. Sergovskaya、Marina V. Chirskaya、Sergey V. Shorshnev
DOI:10.1016/j.tet.2005.12.026
日期:2006.3
Arylboronicacids having a remote azido group were prepared from the corresponding azidosubstituted aryl bromides via lithiation and treatment with trialkyl borates. Preparative yields were achieved when the starting aryl bromides possessed ortho-alkoxy groups, which would stabilize the intermediate aryllithium species. Conventional Suzuki cross-coupling of the arylboronicacids proceeded generally
The reaction of o-(allyloxy)bromobenzenes with copper(I) diethyl malonate afforded diethyl o-(allyloxy)phenylmalonates which under the reaction conditions cyclized to give 4,4-bis(ethoxycarbonyl)-3-methylchromans, 4,4-bis(ethoxycarbonyl)-3-methylenechromans, and 3-(3-butenyl)-4,4-bis(ethoxycarbonyl)chromans.
PYRAZOLOPYRIMIDINE JAK INHIBITOR COMPOUNDS AND METHODS
申请人:Gibbons Paul
公开号:US20120190665A1
公开(公告)日:2012-07-26
A compound of Formula I, enantiomers, diasteriomers, tautomers or pharmaceutically acceptable salts thereof, wherein R
1
, R
2
and R
3
are defined herein, are useful as inhibitors of one or more Janus kinases. A pharmaceutical composition that includes a compound of Formula I and a pharmaceutically acceptable carrier, adjuvant or vehicle, and methods of treating or lessening the severity of a disease or condition responsive to the inhibition of a Janus kinase activity in a patient are disclosed.