Results 71 to 80 of about 3,857 (276)

A Practical, Two-Step Synthesis of 2-Substituted 1,3-Butadienes

open access: yes, 2016
A two-step procedure for preparing 2-alkyl-1,3-butadienes is described. Cuprate addition to commercially available 1,4-dibromo-2-butene yields 3-alkyl-4-bromo-1-butene, a product of SN2′ substitution.
Scott McN. Sieburth (1538176)   +2 more
core   +1 more source

Synthesis and characterization of 1-amino-4-methylthio-2-nitro-1,3-butadienes

open access: yes, 1997
Treatment of 3-nitrothiophene with prim. and sec. amines, followed by S-methylation leads to (Z,Z)-1- amino-4-methylthio-2-nitro-1,3-butadienes (3). Oxidation of these with LTA yields a mixture of the 2-methylthio-4-nitropyrroles (6) and the acetoxylated
Kumaran, Govindaraj   +4 more
core   +1 more source

Ruthenium-Catalyzed Silylation of 1,3-Butadienes with Vinylsilanes

open access: yes, 2015
A novel method for the synthesis of 1-silyl-substituted 1,3-butadienes, based on [RuHCl­(CO)­(PCy3)2]-catalyzed silylative coupling of terminal (E)-1,3-dienes with vinylsilanes, is reported. The reaction provides a facile and straightforward access to (E,
Maciej Kubicki (832465)   +4 more
core   +1 more source

β-Silyl Carbonyl Groups as New Photodegradation Units in Poly(butadienes)

open access: yes, 2016
β-Silyl Carbonyl Groups as New Photodegradation Units in Poly ...
Ke Yung King (2716333)   +2 more
core   +1 more source

Evidence for a Retro-Diels−Alder Reaction on a Single Crystalline Surface:  Butadienes on Ge(100)

open access: yes, 2016
Evidence for a Retro-Diels−Alder Reaction on a Single Crystalline Surface:  Butadienes on Ge ...
Stacey F. Bent (1291512)   +3 more
core   +1 more source

Stereospecific synthesis of - and -1 alkoxy-1,3-butadienes

open access: yes, 1984
A stereospecific, highly efficient, generally applicable synthesis of - and -1-alkoxy-1,3-butadienes involving dehydrative decarboxylations of 4,5-unsaturated-2-alkoxy-3-hydroxy-carboxylic acids is described.Peer Reviewedhttp://deepblue.lib.umich.edu ...
Masato Koreeda   +3 more
core   +1 more source

Zn/Al‐NO3 Layered Double Hydroxide as Alternative Activator for Nitrile Rubber Vulcanization: Effect of the Accelerator‐to‐Sulfur Ratio on Curing Kinetics and Network Properties

open access: yesJournal of Applied Polymer Science, EarlyView.
Zn/Al‐NO3 layered double hydroxide offers a low‐zinc alternative for sulfur vulcanization of nitrile rubber, reducing nominal zinc loading by an estimated 71%. Its potential as a vulcanization activator depends on the curing system: conventional curing preserves tensile strength despite slower kinetics, whereas efficient curing maintains comparable ...
Lucas Castro Roza de Faria   +8 more
wiley   +1 more source

A highly stereoselective synthesis of substituted butadienes and conjugated polyenes

open access: yes, 1992
A highly stereoselective synthesis of 1,3-butadienes and its higher enyl analogs has been developed through thermal dehydrative ring opening of cyclopropyl carbinols in ...
Ila, Hiriyakkanavar   +2 more
core   +1 more source

Synthesis of functionalized diaryl sulfides by cyclocondensation of 3-arylthio-1-silyloxy-1,3-butadienes with 1,1,3,3-tetramethoxypropane, dimethyl allene-1,3-dicarboxylate, 1,1-bis(methylthio)-1-en-3-ones and 3-oxo-orthoesters [PDF]

open access: yes, 2009
This dissertation is concerned with the development of synthesis of functionalized diarylsulfides. The first chapter contains the synthesis of novel 3-arylthio-1-silyloxy-1,3-butadienes in two steps.
Imran, Muhammad (gnd: 138810885)
core   +1 more source

Glyoxylic‐Acetal‐Based Gel‐Polymer Electrolytes for Lithium‐Ion Batteries

open access: yesBatteries &Supercaps, Volume 8, Issue 3, March 2025.
A safe electrolyte based on tetraethoxyglyoxal (LE) is combined with a methacrylate polymer matrix. The resulting gel‐polymer electrolyte (GPE) exhibits an increased flash point, suitable ionic conductivity, and a stable performance in lithium‐ion battery cells.
Christian Leibing   +4 more
wiley   +1 more source

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