Room temperature C(sp2)-H oxidative chlorination: Via photoredox catalysis
Photoredox catalysis has been developed to achieve oxidative C-H chlorination of aromatic compounds using NaCl as the chlorine source and Na2S2O8 as the oxidant. The reactions occur at room temperature and exhibit exclusive selectivity for C(sp2)-H bonds over C(sp3)-H bonds. The method has been used for the chlorination of a diverse set of substrates, including the expedited synthesis of key intermediates to bioactive compounds and a drug.
Low-Valent Titanium-Mediated Radical Conjugate Addition Using Benzyl Alcohols as Benzyl Radical Sources
A concise method to directly generate benzyl radicals from benzyl alcohol derivatives has been developed. The simple and inexpensive combination of TiCl4(collidine) (collidine = 2,4,6-collidine) and manganese powder afforded a low-valent titanium reagent, which facilitated homolytic cleavage of benzylic C-OH bonds. The application to radical conjugate addition reactions demonstrated the broad scope of this method. The reaction of various benzyl alcohol derivatives with electron-deficient alkenes furnished the corresponding radical adducts.
Suga, Takuya,Shimazu, Shoma,Ukaji, Yutaka
p. 5389 - 5392
(2018/09/12)
SUBSTITUTED FLUOROETHYL UREAS AS ALPHA 2 ADRENERGIC AGENTS
Therapeutic compounds, and methods, compositions, and medicaments related thereto are disclosed herein.
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Page/Page column 37
(2008/12/04)
THERAPEUTIC FLUOROETHYLCYANO GUANIDINES
Disclosed herein is compound having a formula as described herein. Therapeutic methods, compositions, and medicaments related thereto are also disclosed.
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Page/Page column 18
(2008/12/04)
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