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1 article(s) from Parsons, Brendon A

Properties of PTFE tape as a semipermeable membrane in fluorous reactions

Brendon A. Parsons,
Olivia Lin Smith,
Myeong Chae and
Veljko Dragojlovic

Beilstein J. Org. Chem. 2015, 11, 980–993, doi:10.3762/bjoc.11.110

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Graphical Abstract

Figure 1: PV-PTFE reaction design.

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Figure 2: Solvent uptake in the delivery of bromine into dichloromethane (a) 0 min, (b) 0.50 min, (c) 0.83 mi...

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Figure 3: Solvent column heights of bromine delivery into dichloromethane (○) and ethyl acetate. (♦).

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Figure 4: Reproducibility of bromine delivery into a) dichloromethane and b) ethyl acetate. In each case thre...

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Figure 5: Height of the solvent column in the course of the bromination of cyclohexene in (a) dichloromethane...

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Figure 6: Height of the solvent column in the course of the bromination of cyclohexene in ethyl acetate (♦) a...

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Figure 7: Solvent uptake when the delivery tube is inserted to a shallow depth. The solvent uptake stopped on...

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Scheme 1: Iodolactonization of unsaturated diester 1 with iodine monochloride in dichlormethane.

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Figure 8: (a) The delivery tube is immersed into the solution and there is a considerable solvent uptake. (b)...

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Figure 9: Transport of dyed dimethyl phthalate in dichloromethane after (a) 0 h, (b) 1 h, (c) 2 h, (d) 3 h an...

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Figure 10: Transport of dyed dimethyl phthalate in ethyl acetate after (a) 0 h, (b) 0.17 h, (c) 1 h, (d) 3 h, ...

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Scheme 2: Chemiluminescence reaction of diaryl oxalate esters oxidized by hydrogen peroxide in the presence o...

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Figure 11: When the diaryl oxalate was oxidized by aqueous peroxide solution, chemiluminescence was observed o...

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Figure 12: Progression of PV-PTFE chemiluminescence with aqueous peroxide solution in the vial after (a) 10 mi...

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Figure 13: Progression of PV-PTFE chemiluminescence with acetonitrile–aqueous peroxide solution in the vial af...

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Figure 14: Diffusion of dimethyl phthalate assisted by tert-butanol through PTFE was visualized in a chemilumi...

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Figure 15: Corrosion of aluminum resulting from bromine applied directly to metal.

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Figure 16: Discoloration of aluminum from bromine applied to PTFE tape on metal.

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Figure 17: After stirring bars were cut open, some iron bars were found to be corroded.

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Figure 18: (a) Diffusion of bromine through a bulk PTFE from stirring bar into dichloromethane after 2 h. (b) ...

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Figure 19: Diffusion of bromine through a PTFE tube.

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Figure 20: (a) The reaction of benzene and bromine in the absence of a stirring bar ( [Graphic 1] ), in the presence of a n...

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Published 09 Jun 2015

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