Pyrimidine derivatives and processes for the preparation thereof
申请人:Novartis AG
公开号:US06251911B1
公开(公告)日:2001-06-26
4-Amino-1H-pyrazolo[3,4-d]pyrimidine derivatives of formula I
wherein the substituents are as defined in claim 1, are described.
These compounds inhibit the tyrosine kinase activity of the receptor for epidermal growth factor (EGF) and c-erbB2 kinase and can be used as anti-tumor agents.
A novel, efficient, and metal-free dual C–O bond formation reaction for the synthesis of carboxylic anhydrides from aryl aldehydes via cross-dehydrogenative coupling is described. Heating a mixture of aromatic aldehydes and an aqueous solution of tert-butyl hydroperoxide as oxidant in the presence of catalytic nBu4PBr in chlorobenzene at 80 °C for 3 h afforded the corresponding carboxylic anhydrides
描述了一种新颖,有效且无金属的双C-O键形成反应,用于通过交叉脱氢偶联由芳基醛合成羧酸酐。在催化性n Bu 4 PBr在氯苯中的存在下,于80°C加热芳香族醛和氢过氧化叔丁基水溶液作为氧化剂,在80°C下加热3 h,得到相应的羧酸酐,收率良好至优异。
A CONVENIENT METHOD FOR SYNTHESIS OF SYMMETRICAL ACID ANHYDRIDES FROM CARBOXYLIC ACIDS WITH TRICHLOROACETONITRILE AND TRIPHENYLPHOSPHINE
作者:Joonggon Kim、Doo Ok Jang
DOI:10.1081/scc-100000529
日期:2001.1
Various carboxylicacids are converted into the corresponding carboxylicacidanhydrides treated with trichloroacetonitrile and triphenylphosphine in the presence of triethylamine at room temperature.
Ligand-Free Palladium-Catalyzed Aerobic Oxidative Coupling of Carboxylic Anhydrides with Arylboronic Acids
作者:Weiyan Yin、Haifeng He、Yani Zhang、Tong Long
DOI:10.1002/asia.201402314
日期:2014.9
We report a new, effective and environmentally friendly protocol for selective aerobic oxidativecoupling of arylboronicacids with carboxylic anhydrides in the presence of ligand‐free palladium catalyst. The aryl benzoates are obtained in good to excellent yields.
Catalytic Deoxygenative Coupling of Aromatic Esters with Organophosphorus Compounds
作者:Miki B. Kurosawa、Ryota Isshiki、Kei Muto、Junichiro Yamaguchi
DOI:10.1021/jacs.0c02839
日期:2020.4.22
We have developed a deoxygenative coupling of aromatic esters with diarylphosphine oxides/dialkyl phosphonates under palladium ca-talysis. In this reaction, aromatic esters can work as novel benzylation reagents to give the corresponding benzylic phosphorus compounds. The key of this reaction is the use of phenyl esters, an electron-rich diphosphine as a ligand, and sodium formate as a hydrogen source
我们开发了在钯催化下芳族酯与二芳基膦氧化物/二烷基膦酸酯的脱氧偶联。在该反应中,芳族酯可作为新型苄基化试剂生成相应的苄基磷化合物。该反应的关键是使用苯酯、富电子二膦作为配体,以及甲酸钠作为氢源。芳基羧酸也适用于该反应,使用 (Boc)2O 作为添加剂。钯/dcype 用于激活酯的酰基 CO 键并支持甲酸钠的还原。