Browsing by Author "Parvez, Masood"
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- ItemOpen Access3,3'-Disubstituted BINAP Ligands: Synthesis, Resolution, and Applications in Asymmetric Hydrogenation(American Chemical Society, 2005) Hopkins, J. Matthew; Dalrymple, Sean A.; Parvez, Masood; Keay, Brian A.
- ItemOpen AccessAn Improved Synthesis and Resolution of (±)-cis,cis-Spiro[4.4]Nonane-1,6-Diol(Elsevier, 1993) Keay, Brian A.; Nieman, James A.; Parvez, Masood
- ItemOpen AccessA Novel Resolution Procedure for the Preparation of P-Stereogenic Phosphine Oxides(American Chemical Society, 1999) Andersen, Neil G.; Ramsden, Philip D.; Che, Daqing; Parvez, Masood; Keay, Brian A.
- ItemOpen AccessPhoto Lewis Acid Generators: Photorelease of B(C6F5)3 and Applications to Catalysis.(Royal Society of Chemistry, 2015-09-24) Piers, Warren E.; Khalimon, Andrey Y.; Marwitz, Adam A. J.; Shaw, Bryan K.; Parvez, Masood; Blackwell, James M.A series of molecules capable of releasing of the strong organometallic Lewis acid B(C6F5)3 upon exposure to 254 nm light have been developed. These photo Lewis acid generators (PhLAGs) can now serve as photoinitiators for several important B(C6F5)3-catalyzed reactions. Herein is described the synthesis of the triphenylsulfonium and diphenyliodonium salts of carbamato- and hydridoborates, their establishment as PhLAGs, and studies aimed at defining the mechanism of borane release. Factors affecting these photolytic reactions and the application of this concept to photoinduced hydrosilylation reactions and construction of siloxane scaffolds are also discussed.
- ItemOpen AccessReassignment of the absolute configuration of the baker's yeast reduction of (±)-ethyl 1-allyl-2-oxocyclopentanecarboxylate(Elsevier, 1999) Keay, Brian A.; Allan, Murray M.; Ramsden, Philip D.; Burke, Michael J.; Parvez, Masood
- ItemOpen AccessRing Expansion Reactions of Electron-Rich Boron-Containing Heterocycles(American Chemical Society, 2015-06-16) Piers, Warren E.; Araneda, Juan F.; Sgro, Michael J.; Parvez, MasoodThe potassium salts of the dianions of isomeric compounds bis-benzocycloborabutylidene, 1, and the ladder diborole 2 were reacted with carbon dioxide (CO2) and carbon monoxide (CO) and the ring expansion products fully characterized. Both dianions 1 and 2 react rapidly with carbon dioxide to form the same insertion product, 3, in which the boron-containing rings are expanded to six-membered rings. Compound 3 is a B–O analogue of binaphtholate. Only dianion 2 reacts cleanly with the weaker electrophile CO, producing a product (4) in which only one of the boron-containing rings is expanded through formal insertion of CO into a B–C bond. The X-ray structures of both 3 and 4 are reported, and reasonable paths to their formation are proposed.
- ItemOpen AccessA Simple Resolution Procedure Using the Staudinger Reaction for the Preparation of P-Stereogenic Phosphine Oxides(American Chemical Society, 2001) Andersen, Neil G.; Ramsden, Philip D.; Che, Daqing; Parvez, Masood; Keay, Brian A.
- ItemOpen AccessSynthesis and applications of (R)- and (S)-7,7'-dimethoxy- 2,2'-bis(diphenylphosphino)-1,1 '-binaphthalene(Elsevier, 2000) Keay, Brian A.; Che, Daqing; Andersen, Neil G.; Lau, Stephen Y.W.; Parvez, Masood
- ItemOpen AccessSynthesis and applications of 1R, 5S,6S-6-(2,2-dimethylpropanamido)spiro[4.4]nonan-1-o1 as a chiral auxiliary in Diels-Alder reactions(Elsevier, 2000) Keay, Brian A.; Burke, Michael J.; Allan, Murray M.; Parvez, Masood
- ItemOpen AccessSynthesis of a 1,3-spiro-amino-alcohol-derived chiral auxiliary and its application to Diels-Alder reactions(Elsevier, 2003) Keay, Brian A.; Lait, Susan M.; Parvez, Masood
- ItemOpen AccessSynthesis of a novel spiro-phosphino-oxazine ligand and its application to Pd-catalyzed asymmetric allylic alkylation(Elsevier, 2004) Keay, Brian A.; Lait, Susan M.; Parvez, Masood
- ItemOpen AccessSynthesis, resolution and applications of 3,3'-bis(RO)-MeO-BIPHEP derivatives(Elsevier, 2004) Keay, Brian A.; Gorobets, Evgueni; Sun, Guang-Ri; Wheatley, Bronwen M. M.; Parvez, Masood
- ItemOpen AccessSynthesis, Resolution, and Applications of 2,2'-Bis(diphenylphosphino)-3,3'- binaphtho[2,1-b]furan(American Chemical Society, 2000) Andersen, Neil G.; Parvez, Masood; Keay, Brian A.
- ItemOpen AccessTetraaquabis(thiourea-κS)cadmium(II) triaquatris(thiourea-κS)cadmium(II) disulfate(International Union of Crystallography, 2012) Parvez, Masood; Jalilehvand, Farideh; Amini, Zahra
- ItemOpen AccessUse of 1H NMR chemical shifts to determine the absolute configuration and enantiomeric purity for enantiomers of 3,3' -disubstituted-MeO-BIPHEP derivatives1(National Research Council Canada, 2006) Gorobets, Evgueni; Parvez, Masood; Wheatley, Bronwen M.M.; Keay, Brian A.