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Journal ArticleDOI

1-Benzyldihydronicotinamide—A Model for Reduced DPN

01 Apr 1955-Journal of the American Chemical Society (American Chemical Society)-Vol. 77, Iss: 8, pp 2261-2264
About: This article is published in Journal of the American Chemical Society.The article was published on 1955-04-01. It has received 300 citations till now.
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TL;DR: This issue discusses proton-coupled electron transfer or PCET processes, which are central to a great many chemical and biochemical processes, from biological catalysis and energy transduction, to bulk industrial chemical processes, to new approaches to solar energy conversion.
Abstract: Many, if not most, redox reactions are coupled to proton transfers. This includes most common sources of chemical potential energy, from the bioenergetic processes that power cells to the fossil fuel combustion that powers cars. These proton-coupled electron transfer or PCET processes may involve multiple electrons and multiple protons, as in the 4 e–, 4 H+ reduction of dioxygen (O2) to water (eq 1), or can involve one electron and one proton such as the formation of tyrosyl radicals from tyrosine residues (TyrOH) in enzymatic catalytic cycles (eq 2). In addition, many multi-electron, multi-proton processes proceed in one-electron and one-proton steps. Organic reactions that proceed in one-electron steps involve radical intermediates, which play critical roles in a wide range of chemical, biological, and industrial processes. This broad and diverse class of PCET reactions are central to a great many chemical and biochemical processes, from biological catalysis and energy transduction, to bulk industrial chemical processes, to new approaches to solar energy conversion. PCET is therefore of broad and increasing interest, as illustrated by this issue and a number of other recent reviews.

1,226 citations

Journal ArticleDOI
TL;DR: In this article, a simple and environmentally benign Hantzsch reaction for polyhydroquinoline derivatives is described. But the process is operationally simple, environmentally benign and has excellent yield.

326 citations

Journal ArticleDOI
TL;DR: In this paper, a simple, inexpensive and efficient one-pot synthesis of 1,4-dihydropyridine derivatives at room temperature using catalytic amount of iodine was reported with excellent product yields.

297 citations

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TL;DR: A review of catalytic metal-free transfer hydrogenations can be found in this paper, where the authors focus on the recent advances in catalytic asymmetric reductions, which are promising and important alternatives to conventional metal-and bio-catalyzed reductions.

242 citations

Journal ArticleDOI
TL;DR: In this article, a facile and efficient one-pot synthesis of polyhydroquinoline derivatives at ambient temperature using Ceric Ammonium Nitrate (CAN) as catalyst via the Hantzsch reaction was reported.

200 citations