Low-melting crystals or a colorless liquid. Melting point 34.1°C. Insoluble in water and denser (1.74 g / cm3) than water. Hence sinks in water. Toxic by ingestion, inhalation and skin absorption. Very irritating to skin and eyes.
The scope of MgI2 as a valuable tool for quantitative and mild chemoselective cleavage of protectinggroups is described here. This novel synthetic approach expands the use of protectinggroups, widens the concept of orthogonality in synthetic processes, and offers a facile opportunity to release compounds from solid supports.
The reductive singleelectrontransfer (SET) umpolung amination of aldehyde-derived hydrazones has been developed through visible-light-promoted photoredox catalysis. The ideal transformation of hydrazones into the corresponding hydrazonamide through selective carbon–hydrogen (C–H) bond functionalization represents one of the most step- and atom-economical methods. This SET umpolung strategy features
Substituent effects on the stereochemistry of substituted cyclohexanone dimethylhydrazone alkylations. An x-ray crystal structure of lithiated cyclohexanone dimethylhydrazone
作者:David B. Collum、Daniel Kahne、Sally A. Gut、Randall T. DePue、Fariborz Mohamadi、Robert A. Wanat、Jon Clardy、G. Van Duyne
DOI:10.1021/ja00329a039
日期:1984.8
Observation de hautes selectivites axiales dans les alkylations des hydrazones metalliques cyano-substituees, mais pas dans le cas de substitution alcoxycarbonyl
Observation de hautes selectivitesaxis dans les 烷基化 de hydrazones metalliques cyano-substituees, mais pas dans le cas de 取代烷氧基羰基
Conversion of Aryl Aldehydes to Benzyl Iodides and Diarylmethanes by H<sub>3</sub>PO<sub>3</sub>/I<sub>2</sub>
作者:Fang Lv、Jing Xiao、Junchun Xiang、Fengzhe Guo、Zi-Long Tang、Li-Biao Han
DOI:10.1021/acs.joc.0c02850
日期:2021.2.5
reductive benzylation reactions with aryl aldehydes. By using a H3PO3/I2 combination, various aromaticaldehydes underwent iodination reactions and Friedel–Crafts typereactions with arenes via benzyl iodide intermediates, readily producing benzyl iodides and diarylmethanes in good yields. Intramolecular cyclization reactions also took place, giving the corresponding cyclic compounds. This new strategy features
在与芳基醛的苄基还原反应中,H 3 PO 3首次被用作还原剂和促进剂。通过使用H 3 PO 3 / I 2组合,各种芳族醛经过苄基碘中间体与芳烃进行碘化反应和Friedel-Crafts型反应,可轻松以高收率生产苄基碘和二芳基甲烷。分子内环化反应也发生,得到相应的环状化合物。这种新策略具有易于处理,低成本和无金属的条件。
The present invention relates to compounds or pharmaceutically-acceptable salts thereof, processes for preparing them, pharmaceutical compositions containing them and their use in therapy. The invention particularly relates to compounds that are polo-like kinase (PLKs) inhibitors useful for the treatment of disease states mediated by PLK, especially PLK4, in particular such compounds that are useful in the treatment of pathological processes which involve an aberrant cellular proliferation, such as tumour growth, rheumatoid arthritis, restenosis and atherosclerosis.