One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, such as the rate of change in the concentration of reactants or products with time. 3081-61-6, Name is L-Theanine, formurla is C7H14N2O3. In a document, author is Zhang, Pingshun, introducing its new discovery. Safety of L-Theanine.
Synthesis of 3-HCF2S-Chromones through Tandem Oxa-Michael Addition and Oxidative Difluoromethylthiolation
A simple protocol for the synthesis of difluoromethylthiolated chromen-4-ones using elemental sulfur and CICF2CO2Na as the difluoromethylthiolating agent is described. Three-component reactions of 2′-hydroxychalcones, CICF2CO2Na, and sulfur under basic conditions using TEMPO as the oxidant afforded HCF2S-containing 4H-chromen-4-one and 9H-thieno[3,2-b]chromen-9-one derivatives in good yield. The protocol is practical and efficient, and the starting materials are cheap and readily available.
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