WILLGERODT-KINDLER'S MICROWAVE-ENHANCED SYNTHESIS OF THIOAMIDE DERIVATIVES
摘要:
The Willgerodt-Kindler reaction was applied to a series of aromatic aldehydes and ketones. The reactions were performed in a dipolar aprotic solvent (mainly DMF) in the presence of a base catalyst (4-methylmorpholine) and utilized microwave (mw) irradiation. The pulsed mw technique rather than the continuous irradiation was preferred because it limited side reactions and hydrogen sulfide production. While not always superior to the thermal activation of the reaction, the procedure involving repetitive short pulses of microwave irradiation was found to be faster and result in consistently cleaner products. The technique can be easily applied in a fast parallel synthesis process.
sphinomethyl)cyclopentane as a catalyst, a range of aryl bromides and chlorides undergoes Suzuki cross-coupling with alkylboronic acids in good yields. Several alkyl substituents such as ethyl, n-butyl, n-octyl, isobutyl or 2,2-dimethylpropyl on the alkylboronic acids have been successfully used. The functional group tolerance on the arylhalide is remarkable; substituents such as fluoro, methyl, methoxy
通过使用[PdCl(C 3 H 5)] 2 /顺式,顺式,顺式-1,2,3,4-四(二苯基膦甲基)环戊烷作为催化剂,一系列芳基溴化物和氯化物进行铃木交叉偶联与烷基硼酸的收率很好。几个烷基取代基,例如乙基,正丁基,n已经成功地使用了烷基硼酸上的-辛基,异丁基或2,2-二甲基丙基。芳基卤对官能团的耐受性显着;可以容忍诸如氟,甲基,甲氧基,乙酰基,甲酰基,苯甲酰基,硝基或腈之类的取代基。此外,该催化剂即使在位阻芳基溴的反应中也可以低负荷使用。
NOVEL TETRAAZA MACROCYCLIC COMPOUND, PREPARATION METHOD THEREOF AND USE THEREOF
申请人:Yoo Jeong Soo
公开号:US20120219495A1
公开(公告)日:2012-08-30
Provided are a cross-bridged tetraaza macrocyclic compound of a novel structure that can be used, for example, as a contrast agent for diagnostic imaging or a radiopharmaceutical and a method for preparing the same.
The disclosed tetraaza macrocyclic compound is able to form a stable metal complex at a lower temperature and allows easy conjugation with a bioactive substance or a chemically active substance, when compared to the existing cross-bridged tetraaza macrocyclic compounds.
BICYCLIC HETEROCYCLE SUBSTITUTED PYRIDYL COMPOUNDS USEFUL AS KINASE MODULATORS
申请人:BRISTOL-MYERS SQUIBB COMPANY
公开号:US20150274696A1
公开(公告)日:2015-10-01
Compounds having the following formula (I) or a stereoisomer or a pharmaceutically-acceptable salt thereof, wherein R
2
is a bicyclic heterocycle, and R
1
, R
3
, R
4
, R
5
and R
6
are as defined herein, that are useful as kinase modulators, including IRAK-4 modulation.
Pd‐Catalyzed Cross‐Coupling of Alkylzirconocenes and Aryl Chlorides
作者:Binyang Jiang、Shi‐Liang Shi
DOI:10.1002/cjoc.202200132
日期:2022.8
perspective yet rarely exploited partners in transition-metal catalyzed cross-coupling reaction. The notoriously low nucleophilicity of alkylzirconocenes and the potential β-H elimination restrict their application in cross-coupling. Herein, we report the first Pd-catalyzed aryl-alkyl cross-coupling of alkylzirconocenes and aryl halides. A commercially available N-heterocyclic carbene (IPr) as the ligand