'Solid product' presentation slideshows

Experiment 20

Experiment 20. CHEMOSELECTIVE REDUCTION WITH NaBH 4. Objectives:. To synthesize vanillin acetate by acetylation of p-vanillin, then to perform a chemoselective reduction using NaBH 4 . To use TLC to follow the course of the reaction.

1.03k views • 29 slides

Chapter 7:

Chapter 7:. Chemical Reactions. 7.1: Chemical reactions alter arrangements of atoms. Atoms interact in chemical reactions: Chemical reaction: produces new substances by changing the way in which atoms are arranged. Bonds between atoms are broken New bonds are formed.

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Antimicrobial Evaluation of Some New Pyrazolyl Pyridinyl Coumarins

The synthesis of various pyrazolyl pyridinyl substituted coumarins 3-{4'-[1''-phenyl -3''- (pyridin-3''' -yl)-1H- pyrazol- 4''-yl]- 6'-aryl -pyridin - 2'-yl} coumarins (4a-f) and 3-{4'-[1''-phenyl-3''-(pyridin-4'''-yl)-1H-pyrazol-4''-yl]-6'-aryl-pyridin-2'-yl}coumarins (5a-f) have been carried out by the reaction of 3-(3-(1-phenyl-3-(pyridin-3-yl)-1H-pyrazol-4-yl)acryloyl)coumarins or 3-(3-(1-phenylu20133- (pyridin-4-yl)-1Hu2013pyrazol-4-yl) acryloyl) coumarins with appropriate aroyl methyl pyridinium salts under Krohnkeu2019s reaction condition. The synthesized compounds were fully characterized by Infrared (IR), Proton Nuclear Magnetic Resonance (1H-NMR), Carbon-13 Nuclear Magnetic Resonance (13C-NMR), DEPT135, DEPT-90 and representative Mass spectral data. The synthesized compounds were screened for in vitro antimicrobial activity using Broth micro dilution method.

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Novaflex-Reduce the joint pain

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How to be the Best Entrepreneur

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Septic Tank Service: A Necessary Part Of House Maintenance

When it comes to owning a house, pipes and septic tank service play a big part in home maintenance and maintenance. Whether you have actually owned a home for fifty years or are purchasing a house for the first time, it is crucial to have a septic tank service assessment done on your system. Not all septic tanks are created equal, and so it pays to go shopping around for an expert who is familiar with a range of various tanks and will do more than just offer you an extensive cleansing and a quick look. The frequency of septic tank service is figured out mainly by the size of the tank and the amount of waste product being processed. The more strong product that collects at the bottom of the tank, the less space there is in the tank for liquids to be processed.

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