Results 171 to 180 of about 3,265,735 (388)

Iodine sorption study on the proposed use of Viton A in a shuttle galley water accumulator [PDF]

open access: yes
The installation of a Viton A accumulator in the Shuttle galley has been proposed to prevent overpressurization of the hot water supply system. A laboratory study has been conducted to determine if there would be any interaction between the Viton A ...
Gibbons, Randall E.   +2 more
core   +1 more source

Regio‐, Stereoselective, Aerobic and Metal‐Free Synthesis of Z‐Vinyl Sulfides: One‐Pot Hydroiodination of Internal Alkynes and in situ Sulfenylations

open access: yesAdvanced Synthesis &Catalysis, Volume 367, Issue 13, July 23, 2025.
Abstract A novel, metal‐free, air‐ and moisture‐compatible one‐pot tandem protocol for the regio‐ and stereoselective synthesis of Z‐vinyl sulfides (achieving yields up to 99%), is reported. This straightforward and efficient process combines the selective hydroiodination of internal alkynes, promoted by the eutectic mixture choline iodide (ChI)/p‐TsOH
Gloria Morís‐Menéndez   +5 more
wiley   +1 more source

Environmental stability of intercalated graphite fibers [PDF]

open access: yes
Graphite fibers intercalated with bromine, iodine monochloride, ferric chloride, and cupric chloride were subjected to stability tests under four environments which are encountered by engineering materials in the aerospace industry: ambient laboratory ...
Gaier, J. R., Jaworske, D. A.
core   +1 more source

Gold‐Catalyzed Synthesis of Fluorenones via Intramolecular C–H Arylation

open access: yesAdvanced Synthesis &Catalysis, EarlyView.
Starting from 2‐diazobenzophenones, a straightforward synthesis of valuable fluorenones via a gold‐catalyzed one‐pot oxidation, C–H activation, and cyclization is described. The addition of ascorbic acid, the correct selection of the counteranion of the 2‐diazobenzophenones, and the use of terpyridine as an auxiliary ligand are crucial for the reaction
Osvaldo Felipe López‐Saladino   +5 more
wiley   +1 more source

Iterative Use of Regiocomplementary Flavin‐Dependent Halogenases Gives Access to Unique Halogenation Patterns

open access: yesAdvanced Synthesis &Catalysis, EarlyView.
The halide motif is ubiquitous in organic synthesis, facilitating fine‐tuning of molecular properties and functionalization using substitution and cross‐coupling reactions. Combination of different flavin‐dependent tryptophan halogenases enables the installation of novel halogenation patterns on l‐tryptophan, which can be orthogonally addressed in ...
Nicolai Montua   +4 more
wiley   +1 more source

Electrochemical Chemo‐ and Regioselective Heterofunctionalization of Tropones via C(sp2)H Derivatization

open access: yesAdvanced Synthesis &Catalysis, EarlyView.
Simple and selective. The electrochemical heterofunctionalization of activated tropones is achieved using readily available inorganic salts. A theoretical model, based on cyclic voltammetry and quantum chemistry calculations, predicts both reactivity trends and site selectivity.
Mauro Garbini   +8 more
wiley   +1 more source

High temperature materials study [PDF]

open access: yes
High temperature operating electronic devices for vapor deposition reactor ...
Baxter, R. D.   +2 more
core   +1 more source

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