DSpace Home
→
Browsing by Author

Browsing by Author "Welker, Mark E."

Now showing items 1-10 of 10

A Cobaloxime Substituted Terminal Alkene Which Rapidly Isomerizes to a Cobaloxime Substituted Internal Alkene Complex

Pickin, Kerry A.; Day, Cynthia S.; Wright, Marcus W.; Welker, Mark E. (2003)

An unusual cobaloxime substituted terminal alkene has been isolated and characterized by X-ray crystallography. The double bond in the alkene readily isomerizes but the title compound could be isolated and structurally ...
Oxathiolene oxides: a novel family of compounds that induce ferritin, glutathione S-transferase, and other proteins of the phase II response

Pietsch, E. Christine; Hurley, Allison L.; Scott, Elizabeth E.; Duckworth, Benjamin P.; Welker, Mark E.; Leone-Kabler, Sandra; Townsend, Alan J.; Torti, Frank M.; Torti, Suzy V. (2003)

Compounds that induce the synthesis of cytoprotective phase II enzymes have shown promise as cancer chemopreventive agents. Although chemically diverse, phase II enzyme inducers are capable of participating in Michael ...
Preparation and Diels–Alder/cross coupling reactions of a 2-diethanolaminoboron-substituted 1,3-diene

Wang, Liqiong; Day, Cynthia S.; Wright, Marcus W.; Welker, Mark E. (Beilstein, 2009)

A 2-diethanolamine boronyl substituted 1,3-diene has been synthesized in high yield and characterized spectroscopically as well as by X-ray crystallography. This diene has then subsequently been used in a number of fast, ...
Preparation of 1,3-Dienyl Organotrifluoroborates and Their Diels-Alder/Cross Coupling Reactions

De, Subhasis; Day, Cynthia S.; Welker, Mark E. (2007)

2-BF3 substituted 1,3-butadienes with potassium and tetrabutyl ammonium counterions have been prepared in gram quantities from chloroprene via a simple synthetic procedure. The potassium salt of this new main group ...
Preparation of disubstituted phenyl propargyl alcohols, their use in oxathiolene oxide synthesis, and evaluation of the oxathiolene oxide products as anticarcinogenic enzyme inducers

Ying, Maben; Smentek, Matthew G.; Ma, Rong; Day, Cynthia S.; Torti, Suzy V.; Welker, Mark E. (Bentham Science Publishers, 2009)

A number of alkynols have been prepared by Sonogoshira coupling of propargyl alcohol to disubstituted aromatic halides. Chelation controlled addition of organometallic nucleophiles to these alkynols was then affected ...
Preparation of Siloxacyclopentene Containing 1,3-Dienes and Their Diels-Alder Reactions

Pidaparthi, Ramakrishna R.; Welker, Mark E. (2007)

A number of enynyloxy dimethyl and diisopropyl silanes have been prepared and converted into siloxacyclopentene containing 1,3-dienes via intramolecular hydrosilylation of the alkyne functional group. Diels-Alder reactions ...
Rhodium Catalyzed Tandem Diels-Alder/Hydrolysis Reactions of 2-Boron-Substituted 1,3-Dienes

De, Subhasis; Solano, John M.; Wang, Liqiong; Welker, Mark E. (2009)

2-Boron substituted 1,3 –dienes have been prepared and used in preliminary experiments to demonstrate that it is possible to effect rhodium catalyzed Diels-Alder/hydrolysis tandem reactions.
Ruthenium Carbenes as Catalysts in stereoselective ene-yne Metathesis/Diels-Alder and ene-yne Metathesis/Diels-Alder/Cross coupling multicomponent reactions

Junker, Christopher S.; Welker, Mark E. (2012)

An ene-yne cross metathesis of silyl substituted alkynes and alkenes followed by a Diels-Alder reaction of the metathesis product 2-silyl-1,3-dienes has been developed. The dienes thus prepared in situ were shown to ...
Substituted Dienols from Palladium Catalyzed Coupling of Hydroaluminated Enynols with Aryl Iodides

Crook, Kenneth E.; Nie, Jin; Welker, Mark E. (2008)

Enynols were hydroaluminated and cross coupled with aryl iodides. Reduction of the yne portion of the enynol is a serious side reaction so reaction conditions to minimize reduction and maximize cross coupling were ...
An unusual oligomerization/oxidation reaction of a 3-boron-substituted 1-phenylbuta-1,3-diene produces 6,9,16,19-tetraphenyl-5,15-distyryl-3,13,25,26-tetraoxa-2,12-diborapentacyclo[16.2.2.28,11.12,5.112,15]hexacosa-1(20),7,10,17-tetraene

De, Subhasis; Day, Cynthia S.; Welker, Mark E. (2007)

An unusual hexameric structure has been isolated from exposure of 3-BF3-1-Phenyl-1,3-Butadiene to air and moisture in an attempt to obtain crystals of the starting compound. Formation of this hexamer is rationalized and ...

Now showing items 1-10 of 10

Search DSpace

Advanced Search

Browse

All of DSpace

Browsing by Author "Welker, Mark E."

DSpace/Manakin Repository

Browsing by Author "Welker, Mark E."

Search DSpace

Browse

All of DSpace

My Account