In a Knoevenagel Condensation reaction: Briefly explain the problem with the following technique The CaCl2 drying tube was omitted during the synthesis of ethyl coumarin-3- carboxylate?
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In a Knoevenagel Condensation reaction: Briefly explain the problem with the following technique
The CaCl2 drying tube was omitted during the synthesis of ethyl coumarin-3-
carboxylate?
Step by step
Solved in 2 steps
- Show how you would use extractions with a separatory funnel to separate a mixture of the following compounds: benzoicacid, phenol, benzyl alcohol, anilineA chemist wanted to synthesize the anesthetic 2-ethoxy-2-methylpropane. He used ethoxide ion and 2-chloro-2-methylpropane for his synthesis and ended up with no ether. What was the product of his synthesis? What reagents should he have used?What is the role of an acid catalyst in nucleophilic addition of aldehydes and ketone?
- what is the structure of o-methylphenoxide anion and what is its pKa?Write an equation showing how you could prepare ethyl phenyl ketone from propanenitrile and a Grignard reagent. What is the structure of the imine intermediate?ČOEt 1. EtO-Na+ OEt 3. NAOH, H,O, heat EtO 4. HCI, heat 2-Carbethoxy- 4-Butanolactone 4-butanolactone (y-Butyrolactone) Show how the scheme for formation of 4-butanolactone can be used to synthesize lactones (a) and (b), each of which has a peach odor and is used in per- fumery. As sources of carbon atoms for these syntheses, use diethyl malonate, ethylene oxide, 1-bromoheptane, and 1-nonene. (b) (racemic) (racemic)
- The 1H- and 13C-NMR data of an ester of molecular formula C6H10O2 are given below. Also shown are the COSY and HETCOR NMR spectra of the ester. Draw the structure of the ester, explaining how you reach your conclusion. 1H-NMR: 7.20-6.90 (1H), 5.85 (1H), 4.16 (2H), 1.88 (3H), 1.31 (3H) ppm 13C-NMR: 166.7, 144.5, 123.0 , 60.2, 18.0, 14.3 ppmANAL 728: Identifying an Unknown Aldehyde or Ketone 4. In the procedure for preparing semicarbazone derivatives, what is the pur- pose of adding sodium acetate to semicarbazide hydrochloride? TAE MOIT EMAN SHoS 10 shysshlA ruoolrU nn gniytiinshl18STJAMA InsmngizaA yiolsTodsl-91114. The smell of acetaldehyde appears when heated with potassium permanganate and the addition of dilute sulfuric acid: A) Ascorbic acid B) Calcium lactate C) Gamma-aminobutyric acid D) Chlorotane
- When acetophenone, hydroxelamine hydrochloride, and sodium hydroxide are reacted to synthesize acetophenone oxime, why is it necessary to add hydrochloric acid after the reaction to make it acidic?Which of the following is best set of conditions for the preparation of tert-Butanol? 1-tert-butyl fluoride in water 2-tert-butyl bromide and NaOH in DMSO 3-tert-butyl bromide in water 4-tert-butyl fluoride and NaOH in DMSOIn the reaction of the phenol nitration, a mixture of o-nitrophenol and p-nitrophenol is formed. The melting point of nitrophenol is 45, the melting point of p-nitrophenol is 112 ° C. How would you interpret this difference depending on their molecular structure?