Susan L. Wheaton
Mount Allison University
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Featured researches published by Susan L. Wheaton.
Chemistry & Biodiversity | 2008
Justin W. Hicks; Christian B. Kyle; Christopher M. Vogels; Susan L. Wheaton; Felix J. Baerlocher; Andreas Decken; Stephen A. Westcott
Addition of thiosemicarbazide, 4‐allylthiosemicarbazide, and 4‐phenylthiosemicarbazide to (formylphenyl)boronic acids affords a series of thiosemicarbazones containing boronic acids. Addition of 2‐formylphenylboronic acid to the thiosemicarbazides gave the corresponding cyclic 2,3,1‐benzodiazaborines. All new compounds have been investigated for potential antifungal activity.
Central European Journal of Chemistry | 2008
Dominique R. Duguay; Matthew T. Zamora; Johanna M. Blacquiere; Francis E. Appoh; Christopher M. Vogels; Susan L. Wheaton; Felix J. Baerlocher; Andreas Decken; Stephen A. Westcott
The addition of formylphenylboronic acid derivatives to thiourea and ethyl acetoacetate proceeds in the presence of an additional Lewis acid catalyst to give the corresponding 3,4-dihydropyrimidin-2(1H)-(thio)ones (Biginelli products) in moderate yield. Compounds were tested for antifungal activity against pure cultures of Aspergillus niger, Aspergillus flavus, Candida albicans and Saccharomyces cerevisiae but, unfortunately, none showed any appreciable activity.
Australian Journal of Chemistry | 2010
Felix J. Baerlocher; Robert Bucur; Andreas Decken; Charles R. Eisnor; Robert A. Gossage; Sarah M. Jackson; Leslie Jolly; Susan L. Wheaton; R. Stephen Wylie
Ethanol solutions of the cobalt(ii) halides react with an excess of 2-(ortho-anilinyl)-4,4-dimethyl-2-oxazoline (1: i.e. 2-(2′-anilinyl)-4,4-dimethyl-4,5-dihydro-1,3-oxazole) to give isolable κ2-N,N′-bonded species of 1 in good to excellent yields. The complexes CoX2(1-κ2-N,N′)·(H2O) n have been isolated for X = Cl (2: n = 1/2), X = Br and I (3 and 4, respectively; n = 0); the solid-state structures (X-ray) are in accordance with those suggested by UV-visible spectroscopy and conductivity measurements (i.e. non-ionic complexes with a pseudo-tetrahedral coordination motif around Co). In contrast, reaction of excess 1 with Co(NCS)2 forms the octahedral (UV-visible, X-ray) bis-isothiocyanato complex Co(NCS-κ1-N′)2(1-κ2-N,N′)2 (5) with cis-oriented NCS groups and trans-disposed oxazolines. Calculations at the PM3(tm) level of theory suggest that this isomer is close in energy to the four other possible (gas-phase) isomers. Treatment of ethanol solutions of hydrated cobaltous nitrate with excess 1 yields a material analyzed as [Co(NO3)(1)(H2O)2](NO3) (6a) and a small amount (less than 1%) of a second complex (6b); the latter has been characterized (X-ray) as the hydrated octahedral complex [Co(NO3-κ1-O)(1-κ2-N,N′)2(OH2)](NO3). In this case, the nitrato and aqua groupings are located cis to one another and trans to the coordinated –NH2 groups. Complex 6a is surmised to have a [Co(NO3-κ2-O,O′)2(1-κ2-N,N′)(OH2)2]NO3 structure. Cobalt compounds 2–5 and 1 have also been screened for their antifungal properties against Aspergillus niger, Aspergillus flavus, Candida albicans, and Saccharomyces cerevisiae but were found to be inactive in this regard.
Central European Journal of Chemistry | 2010
Susan L. Wheaton; S. M. Humanayun Kabir; Haiwen Zhang; Christopher M. Vogels; Andreas Decken; Stephen A. Westcott
AbstractAddition of pinacolborane (HBO2C2Me4) to 2-iodoaniline can be catalyzed using a number of palladium complexes, including [(t-Bu)2PCl]2PdCl2 (PXPd), to give the corresponding boronate ester 2-H2NC6H4(BO2C2Me4) in excellent yields. The PXPd system could also be used in the catalyzed borylation of substituted anilines to give the corresponding aminoboronate esters in moderate to high yields.
Transition Metal Chemistry | 2005
Robin R. Coombs; Melissa K. Ringer; Johanna M. Blacquiere; Joshua C. Smith; J. Scott. Neilsen; Yoon-Seo Uh; J. Bryson. Gilbert; Lisa J. Leger; Haiwen Zhang; Alison M. Irving; Susan L. Wheaton; Christopher M. Vogels; Stephen A. Westcott; Andreas Decken; Felix J. Baerlocher
Transition Metal Chemistry | 2005
Haiwen Zhang; David W. Norman; Tracey M. Wentzell; Alison M. Irving; Janet P. Edwards; Susan L. Wheaton; Christopher M. Vogels; Stephen A. Westcott; Felix J. Baerlocher; Andreas Decken
Canadian Journal of Chemistry | 2005
Tara A. Bourque; Megan E. Nelles; Teri J. Gullon; Christian N. Garon; Melissa K. Ringer; Lisa J. Leger; Jamie W. Mason; Susan L. Wheaton; Felix J. Baerlocher; Christopher M. Vogels; Andreas Decken; Stephen A. Westcott
Heteroatom Chemistry | 2009
Francis E. Appoh; Susan L. Wheaton; Christopher M. Vogels; Felix J. Baerlocher; Andreas Decken; Stephen A. Westcott
Transition Metal Chemistry | 2006
Haiwen Zhang; Jennifer E. Enman; Maren L. Conrad; Marcy J. Manning; Courtney S. Turner; Susan L. Wheaton; Christopher M. Vogels; Stephen A. Westcott; Andreas Decken; Felix J. Baerlocher
Canadian Journal of Chemistry | 2005
Jonathan D. Webb; Hanni A. Darwish; Haiwen Zhang; Susan L. Wheaton; Felix J. Baerlocher; Christopher M. Vogels; Andreas Decken; Stephen A. Westcott