Results 41 to 50 of about 5,533 (176)

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

European Journal of Organic Chemistry, Volume 29, Issue 5, 7 February 2026.
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

Palladium-Catalyzed Enantioselective Decarboxylative Allylic Alkylation of Cyclopentanones [PDF]

, 2015
The first general method for the enantioselective construction of all-carbon quaternary centers on cyclopentanones by enantioselective palladium-catalyzed decarboxylative allylic alkylation is described.
Abbas H. K., Andrew M. Harned, Brian M. Stoltz, Douglas C. Behenna, Justin T. Mohr, Robert A. Craig, Steven A. Loskot   +6 more
core   +3 more sources

Synthetic Studies on Cyclopentane Derivatives

Agricultural and Biological Chemistry, 1969
An alternative route to dl-prostaglandin-B1 using the Grignard reaction of 2-(6′-tert-butyloxycarbonylhexyl)-3-methoxy-2-cyclopenten-1-one(XII) with 3-tetrahydropyranyloxy-1-octyne was developed.An easy synthesis of dihydrojasmone was also described.
Junki KATSUBE, Masanao MATSUI
openaire   +3 more sources

Removal of Steroid Hormone Micropollutants by an Electrochemical Carbon Nanotube Membrane Flow‐Through Reactor: Role of Concentration and Degradation Mechanisms

Advanced Functional Materials, Volume 36, Issue 11, 5 February 2026.
A flow‐through electrochemical membrane reactor equipped with a carbon nanotube membrane eliminates the mass transfer limitation, achieving removals >97.5% for steroid hormone (SH) micropollutants through electrochemical adsorption and degradation, over a broad initial concentration varying from 50 to 106 ng L−1.
Siqi Liu, David Jassby, Andrea I. Schäfer   +2 more
wiley   +1 more source

Theoretical investigation of atomic oxygen erosion mechanisms of 1,3-didecyl cyclopentane, 1,3-dioctyldodecyl cyclopentane and alkylated cyclopentane

RSC Adv., 2014
Atomic oxygen erosion mechanisms of 1,3-didecyl cyclopentane, 1,3-dioctyldodecyl cyclopentane and alkylated cyclopentane.
Jingyan Nian, Ping Gao, Yongcheng Wang, Zhiguang Guo, Weimin Liu   +4 more
openaire   +1 more source

P‐Chiral (Biaryl phosphine)gold(I) Complexes in Asymmetric Cyclizations of Diverse 1‐Aryl‐1,6‐enynes

ChemistryEurope, Volume 4, Issue 2, February 2026.
A new family of P‐chiral biaryl phosphine ligands coordinates gold and the resulting complexes catalyze asymmetric 1,6‐enyne cycloisomerization reactions affording cyclopentano dihydronaphthalenes in good yields with mostly high enantioselectivity. The approach is applicable to the synthesis of a podophyllotoxin analog.
Nguyen Huu Trong Phan, Radek Pohl, Miroslav Hájek, Ivana Císařová, Ullrich Jahn   +4 more
wiley   +1 more source

Enantioselective nickel-catalyzed intramolecular allylic alkenylations enabled by reversible alkenylnickel E/Z isomerization [PDF]

, 2017
Enantioselective nickel-catalyzed arylative cyclizations of substrates containing a Z-allylic phosphate tethered to an alkyne are described. These reactions give multisubstituted chiral aza- and carbocycles, and are initiated by the addition of an ...
Akiyama, Alexakis, Allen, Börjesson, Cherney, Chung, Clarke, Comins, Consiglio, Consiglio, Consiglio, Daini, Gao, Gao, Gao, Gomez-Bengoa, Hamilton, Harris, Hartwig, Harutyunyan, Hiyama, Huggins, Indolese, Jung, Kita, Kobayashi, Kobayashi, Langlois, Lee, Li, Lin, Liu, Miura, Miura, Miura, Moberg, Murakami, Nagel, Ohmiya, Ohmiya, Schrems, Shields, Shimada, Shintani, Sidera, Son, Sperger, Sprinz, Srinivas, Taylor, Taylor, Tollefson, Tollefson, Tosatti, Trost, Trost, Trost, von Matt, Wang, Wisniewska, Yamamoto, Yonova, Youn, Zeng, Zhang, Zhou   +65 more
core   +2 more sources

Seasonal Changes in Marine Archaeal Tetraether Lipid Export Depth Linked to Net Primary Productivity

Paleoceanography and Paleoclimatology, Volume 41, Issue 2, February 2026.
Abstract Marine ammonia oxidizing archaea (AOA) produce isoprenoid glycerol dibiphytanyl glycerol tetraethers (GDGTs) which form the basis of seawater temperature proxy TEX86. Although most studies use TEX86 for sea surface temperature (SST) reconstructions, maximum GDGT production occurs at and below the nitracline. Moreover, sedimentary GDGT‐2/GDGT‐3
Addison Rice, Eunmi Park, Gesine Mollenhauer, Daisy Bouwmans, Anouk van Boxtel, Gert J. de Lange, Ryan Paul, Francesca Sangiorgi, Ryan Smulders, Jan‐Berend Stuut, Martin Ziegler, Appy Sluijs, Francien Peterse   +12 more
wiley   +1 more source

Catalytic stereoselective [2,3]-rearrangement reactions [PDF]

, 2015
The authors thank the Royal Society for a University Research Fellowship (A.D.S.), the European Research Council under the European Union’s Seventh Framework Programme (FP7/2007-20013) ERC Grant Agreement No.
Kasten, Kevin, Smith, Andrew David, Spoehrle, Stephanie Suzanne Madeleine, Taylor, James Edward, West, Thomas Henry   +4 more
core   +1 more source

Nutzung des kooperativen Energie‐ und Wasserstofftransfers für die direkte Aminierung von nicht aktivierten Alkanen

Angewandte Chemie, Volume 138, Issue 3, 16 January 2026.
Kooperativer EnT & HAT: neue Methode zur direkten C─N‐Kopplung von nicht aktivierten Alkanen. Metallfreie photokatalytische Aminierung. Verwendung von nicht aktivierten Alkanen. Neuartiger Reaktionsweg. Abstrakt Während in letzter Zeit wichtige Fortschritte bei der direkten Funktionalisierung von Alkanen durch photokatalytische Verfahren erzielt wurden,
Sai Teja Kolla, Àlex Díaz‐Jiménez, Sven Trienes, Ignacio Funes‐Ardoiz, Joanna Wencel‐Delord   +4 more
wiley   +1 more source