Refernces
10.1016/S0040-4020(01)00801-8
The study focuses on the synthesis of functionalized tetradentate ligands for use in Ru-sensitized solar cells, aiming to improve light absorption and prevent cis-isomerization. Key chemicals used include 6,6'-bis(1-H-benzimidazol-2-yl)-4,4'-bis(methoxycarbonyl)-2,2'-bipyridine and a series of new quaterpyridines as tetradentate ligands, along with various reagents such as peracetic acid, dimethyl sulfate, potassium cyanide, and o-phenylenediamine dihydrochloride. These chemicals serve to construct and modify the ligands through a series of reactions, with the goal of creating stable trans-complexes that enhance the efficiency of solar cells by shifting the lowest energy MLCT band and improving light absorption.
10.1021/jo01091a006
The research encompasses two distinct studies. The first study aims to synthesize simple structural analogs of khellin, a compound with known physiological activity, to further explore its chemistry and potential applications. Key chemicals used in this study include 2,3,4,6-tetramethoxy-3-ethylacetophenone (VI), 2-hydroxy-3,4,6-trimethoxy-5-ethylacetophenone (V), and various reagents such as copper-chromium oxide catalyst, dimethyl sulfate, acetyl chloride, aluminum chloride, and piperonal. The second study investigates the reaction of o-alkenylphenols with peracetic acid to understand the products and mechanisms involved. Key chemicals used in this study include o-allylphenol, o-propenylphenol, peracetic acid, acetic anhydride, and sulfuric acid. The study concludes that the product from o-allylphenol is 2-hydroxymethylcoumaran, not the previously reported epoxide, and that the product from o-propenylphenol is 1-(o-hydroxyphenyl)-2-propanone, formed through a different mechanism than previously thought. This research provides a clearer understanding of the reactions involving o-alkenylphenols and peracetic acid, correcting and expanding upon earlier findings.
10.1080/00397911.2010.527421
The research aims to develop a novel and efficient method for synthesizing γ-lactone, keto-d-lactone, and butenolide derivatives through the Baeyer–Villiger rearrangement of cyclobutanones. These compounds are significant due to their widespread presence in nature and potential biological activities, making them valuable as intermediates in the synthesis of complex natural products. The study explores the Baeyer–Villiger rearrangement conditions using various cyclobutanones, identifying that freshly prepared peracetic acid with sodium acetate in refluxing CHCl3 provides excellent conversion and good yields. The researchers also developed a one-pot synthesis of keto-d-lactone from the rearrangement products using p-TsOH in refluxing benzene. Additionally, they synthesized butenolide derivatives through a series of reactions involving lithium diisopropylamide (LDA) and PhSeCl, followed by hydrogen peroxide treatment. The study concludes that this method offers a facile and efficient route for the synthesis of these important chemical structures, with potential applications in the total synthesis of natural products like stryllactone. Key chemicals used in the research include cyclobutanone derivatives, peracetic acid, sodium acetate, p-TsOH, NaBH4, LDA, PhSeCl, and hydrogen peroxide.
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