Results 141 to 150 of about 83,038 (344)

Electrochemical Three‐Component Synthesis of Vinyl Sulfonamides via Decarboxylative Sulfonylation of Cinnamic Acids

ChemSusChem, EarlyView.
An efficient, metal‐free electrochemical three‐component reaction of cinnamic acids, SO2, and amines to access (E)‐β‐styryl sulfonamides is reported. Utilizing graphite electrodes and SO2 stock solutions, this decarboxylative protocol proceeds under mild conditions with high regio‐ and stereoselectivity.
Po‐Chung Chien, Harald Kelm, Georg Manolikakes   +2 more
wiley   +1 more source

Chiral Indolizinium Salts Derived from 2-Pyridinecarbaldehyde—First Diastereoselective Syntheses of (−)-1-epi-lentiginosine [PDF]

, 2023
Hisami Rodríguez‐Matsui, David M. Aparicio, María L. Orea, Jorge R. Juárez, Víctor Gómez‐Calvario, Dino Gnecco, Alan Carrasco‐Carballo, Joel L. Terán   +7 more
openalex   +1 more source

Crystal and molecular structure of bis(8-phenylmenthyl) 2-(2-methyl-5-oxo-3-cyclohexen-1-yl)propandioate, C\u3csub\u3e42\u3c/sub\u3eH\u3csub\u3e54\u3c/sub\u3eO\u3csub\u3e5\u3c/sub\u3e• CH\u3csub\u3e3\u3c/sub\u3eCN [PDF]

, 2006
The X-ray crystal structure of the title compound, as crystallized from acetonitrile-water was determined. The relative stereochemistry of the cyclohexenone ring with respect to the 8-phenylmenthyl esters was determined.
Bennett, Dennis W., Chaudhury, Subhabrata, Donaldson, William, Haworth, Daniel T., Siddiquee, Tasneem A.   +4 more
core   +1 more source

Further Insights Into the Metabolism of LGD‐4033 in Human Urine. Part 1. Structure Elucidation of Additional Important Metabolites

Drug Testing and Analysis, EarlyView.
Well‐characterized, chemically synthesized molecules related to LGD‐4033 metabolism were used as analytical standards for the analysis of LGD‐4033 post‐administration urine samples. This approach offered further insights into LGD‐4033 metabolism, providing solid experimental proof for the structure of important previously reported metabolites and ...
Yiannis S. Angelis, Panagiotis Sakellariou, Mario Thevis, Andreas Thomas, Michael Petrou, Emmanuel N. Pitsinos   +5 more
wiley   +1 more source

Photocatalyzed Ring Expansion of α‐Ketosulfonylaziridines: Ready Access to δ‐Sultams

Angewandte Chemie, Volume 138, Issue 4, 22 January 2026.
A novel radical–polar crossover (RPC) photoredox‐catalyzed reaction for the synthesis of δ‐sultams from N‐sulfonyl α‐ketoaziridines through a controlled ring opening–expansion process is presented. This method allows the easy access to sultams with an unprecedented substitution pattern in up to 85% yield and 2:1 d.r., and highlights the potential of ...
Marco M. Mastandrea, Stefania Perulli, Vittoria Martini, Ludovica Primitivo, Lei‐Jie Zhou, Christian Mück‐Lichtenfeld, Miquel A. Pericàs, Olga García Mancheño   +7 more
wiley   +2 more sources

Ring Formation in Sesquiterpene Synthesis: Biomimetic vs. Non‐Biomimetic Strategies

European Journal of Organic Chemistry, EarlyView.
A short review of cyclase enzyme‐mediated ring formation in sesquiterpene biosynthesis is presented as a prelude to six case studies examining the merits and demerits of biomimetic vs. non‐biomimetic strategies for carbocyclisation in the total synthesis of this iconic natural product class.
Bohan Lin, Chen Dai, Alan C. Spivey
wiley   +1 more source

Controlled diastereoselectivity at the alkene-geometry through selective encapsulation: E-Zphotoisomerization of oxazolidinone-functionalized enecarbamates within hydrophobic nano-cavities

, 2006
Hideaki Saito, Jayaraman Sivaguru, Steffen Jockusch, Joanne Dyer, Yoshihisa Inoue, Waldemar Adam, Nicholas J. Turro   +6 more
openalex   +1 more source

A Shortened Synthesis of Optically Pure Tricarbonyl[methyl (2E,4E)-6-oxo-2,4-hexadienoate]Iron Leading to Improved Yield [PDF]

, 2010
The (+)- and (–)-enantiomers of tricarbonyl[methyl (2E,4E)-6-oxo-2,4-hexadienoate]iron are prepared in 4 steps from commercially available hexadienal (26% and 25% yields, respectively)
Donaldson, William, Lindeman, Sergey, Pandey, Rajesh K.   +2 more
core   +2 more sources

Transannular O‐Heterocyclization Reactions of Cyclododeca‐1,5,9‐triene Derivatives: A New Concept for the Preparation of Key Intermediates for Total Syntheses of Annonaceous Acetogenins

Helvetica Chimica Acta, EarlyView.
Four stereogenic centers are formed diastereoselectively in one step from a cyclic (E,E)‐1,5‐diene system using an electrophilic addition reaction. Subsequent ozonolytic cleavage of the intact Z‐double bond, followed by intramolecular nucleophilic substitution, yields an octahydroterfurandione with a threo,cis,threo configuration, an arrangement found ...
Holger Schimanski, André Streiter, Micheline May, Oliver Mimkes, Johannes van Kempen, Constantin Daniliuc, Günter Haufe   +6 more
wiley   +1 more source

A Diastereoselective Oxa-Pictet–Spengler-Based Strategy for (+)-Frenolicin B and epi-(+)-Frenolicin B Synthesis

, 2013
Yinan Zhang, Xiachang Wang, Manjula Sunkara, Qing Ye, Larissa V. Ponomereva, Qing‐Bai She, Andrew J. Morris, Jon S. Thorson   +7 more
openalex   +1 more source