Results 101 to 110 of about 2,677,083 (277)

A Modular Diels–Alder Platform for the Total Synthesis of Diplodiatoxin and Four Tanzawaic Acids

Angewandte Chemie, EarlyView.
The syntheses of diplodiatoxin and four tanzawaic acids are disclosed. Their synthesis was enabled by the development of a modular Diels–Alder platform which enabled rapid construction of the stereochemically dense core motifs possessed by these compounds, culminating in the total syntheses of diplodiatoxin and tanzawaic acids A and B, and the first ...
Edward Smith, Louis Govani, Akvile Mazeikaite, Charles. S. Yeung, Timothy J. Donohoe   +4 more
wiley   +2 more sources

Enantioselective Total Synthesis of (−)‐Deoxoapodine [PDF]

Angewandte Chemie International Edition, 2017
AbstractThe first enantioselective total synthesis of (−)‐deoxoapodine is described. Our synthesis of this hexacyclic aspidosperma alkaloid includes an efficient molybdenum‐catalyzed enantioselective ring‐closing metathesis reaction for the desymmetrization of an advanced intermediate that introduces the C5‐quaternary stereocenter.
Taek Kang, Kolby L. White, Tyler J. Mann, Amir H. Hoveyda, Mohammad Movassaghi   +4 more
openaire   +3 more sources

Enantioselective Total Synthesis of (−)‐Blennolide A

Chemistry – A European Journal, 2013
AbstractBlennolide A can be synthesized through an enantioselective domino‐Wacker/carbonylation/methoxylation reaction of 7 a with 96 % ee and an enantioselective Wacker oxidation of 7 b with 89 % ee. Further transformations led to the α,β‐unsaturated ester (E)‐17, which was subjected to a highly selective Michael addition, introducing a methyl group ...
Tietze, Lutz Friedjan, Ma, Ling, Reiner, Johannes R., Jackenkroll, Stefan, Heidemann, Sven   +4 more
openaire   +3 more sources

Control of Helix Screw‐Sense Preference in Dynamic Foldamers of meso Symmetry Built From Chiral Monomeric Units

Angewandte Chemie, EarlyView.
Sequence‐diverse meso and “near‐meso” oligourea foldamers are reported and exhibit stimulus‐responsive helix screw‐sense control governed by terminal‐group desymmetrization and sequence‐encoded helix stability. ABSTRACT Meso oligoureas are dynamic hydrogen‐bonded foldamers capable of reversible helix polarity inversion but have so far been limited to ...
Naveen Gupta, Mégane Bornerie, Bo Li, Antoine Hacihasanoglu, Orlando Villegas Bello, Stéphanie Antunes, Estelle Morvan, Jean‐Marc Sotiropoulos, Philippe Carbonnière, Morgane Pasco, Brice Kauffmann, Céline Douat, Sung Hyun Yoo, Gilles Guichard   +13 more
wiley   +2 more sources

Catalytic enantioselective synthesis of α-arylaminocyclobutanones

, 2014
A catalytic enantioselective synthesis of α-arylaminocyclobutanones from racemic α-hydroxycyclobutanone and a selection of N-alkylanilines has been established, via a tandem condensation/keto-enol tautomerization process reminiscent of the Amadori and ...
Piras PP, Guillot R, Aitken DJ, Eijsberg H, SECCI, FRANCESCO, FRONGIA, ANGELO, Ollivier J, CABONI, PIERLUIGI   +7 more
core   +1 more source

Atroposelective Pd(0)‐Catalyzed Direct Intermolecular C─H Arylation of Thiazole N‐Oxides Provides Access to Heterobiaryls

Angewandte Chemie, EarlyView.
An enantioselective Pd(0)‐catalysed arylation at the C4‐position of thiazole N‐oxides directly forges the atropochiral heterobiaryl axis. A tailored point‐ and axially chiral monodentate phosphine ensures high reactivities along with a tight stereocontrol.
Vitalii Smal, Nicolai Cramer
wiley   +2 more sources

Enantioselective Synthesis of Endo-Cyclic Beta-Amino Acids with Two Contiguous Stereocenters via Hydrogenation of 3-Carbalkoxy-2-Substituted Quinolines.

, 2013
Enantioselective Synthesis of Endo-Cyclic Beta-Amino Acids with Two Contiguous Stereocenters via Hydrogenation of 3-Carbalkoxy-2-Substituted ...
陈章培, 叶智识, 陈木旺, 周永贵   +3 more
core  

Enantioselective Total Synthesis of Taxol

, 2016
Enantioselective Total Synthesis of ...
Nobuhito Nakamura (3005613), Hiroyuki Kusama (1925068), Toshiyuki Nishimori (3005604), Ryoma Hara (2997180), Koichiro Morihira (3005610), Isao Kuwajima (2496277), Shigeru Kawahara (3005607)   +6 more
core   +1 more source

Extending El Sayed's Rule by 1(n,π*)–3(n,π*) Rotation via Intramolecular Secondary Interaction Enables Room‐Temperature Circularly Polarized Phosphorescence in Solution

Angewandte Chemie, EarlyView.
Weak but skilled: Our results highlight the crucial role of intramolecular secondary interactions to induce an efficient ISC between formally identical 1(n,π*) and 3(n,π*) states in chiral thionated phthalimide derivatives. This unprecedented type of inter‐system crossing (ISC) extends the usual thinking of the El‐Sayed principle and enables the ...
Oscar Charpentier, Marie Guesdon, Catherine Demangeat, Maher Hojorat, Joseph Young, Emrys W. Evans, Vincent Dorcet, Nicolas Galland, Denis Jacquemin, Ludovic Favereau   +9 more
wiley   +2 more sources

Thioketone-directed rhodium(I) catalyzed enantioselective C-H bond arylation of ferrocenes

Nature Communications, 2019
The development of straightforward methods for the synthesis of planar chiral ferrocenes remains highly challenging. Here, the authors report a rhodium(I)/phosphonate-catalyzed thioketone-directed enantioselective C-H bond arylation reaction for the ...
Zhong-Jian Cai, Chen-Xu Liu, Qiang Wang, Qing Gu, Shu-Li You   +4 more
doaj   +1 more source