WebUnder light irradiation at 390 nm, a commercially available and inexpensive electron donor, Hantzsch ester (HE, diethyl-1,4-dihydro-2,6-dimethyl-3,5-pyridinedicarboxylate), serves as a potent organic photoreductant to … Hantzsch ester refers to an organic compound with the formula HN(MeC=C(CO2Et))2CH2 where Me = methyl (CH3) and Et = ethyl (C2H5). It is a light yellow solid. The compound is an example of a 1,4-dihydropyridine. It is named after Arthur Rudolf Hantzsch who described its synthesis in 1881. The compound is a hydride donor, e.g., for reduction of imines to amines. It is a synt…

Learning from the Hantzsch synthesis - American …

WebJun 27, 2024 · Hantzsch esters: an emerging versatile class of reagents in photoredox catalyzed organic synthesis Peng-Zi Wang,a Jia-Rong Chen *a and Wen-Jing Xiao a Author affiliations Abstract Hantzsch esters were … WebOct 28, 2024 · Hantzsch ester (HE) functions as a cheap, green and strong photoreductant to facilitate radical generation and also engages in the Ni-catalytic cycle to restore the reactive species. With this dual role, HE allows for the coupling of a large variety of radicals (1°,2°, benzylic, α-oxy & α-amino) with aroyl and alkanoyl moieties, a new ... five facts about horses

Hantzsch Ester-Mediated Visible-Light-Induced …

WebNov 22, 2024 · Visible light promoted coupling of alkynyl bromides and Hantzsch esters for the synthesis of internal alkynes†. Zhi-Yong Song ab, Chun-Lin Zhang a and Song Ye * ab a Beijing National Laboratory for … Webmeasurements. Then, the Hantzsch ester 2 (7.6 mg, 0.030 mmol) was added to the sample in the glove box. The resulting solution was immediately analyzed by 1H NMR (< 10 min) to determine the formation of tris[3,5-bis(trifluoromethyl)phenyl]borane-benzyl alcohol adduct Int-IIIa. Mesitylene (3.5 mg) was added to the solution as an internal standard. five facts about jennifer lopez