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- (b) How can be prepared from OEt CO,Et and at EtO OEt EtO2C 95 °C ? Provide the mechanism.We your anver on paper and submit a picture here gir emaitto me ty the end of pe time for he exam CHOH CH.OH CHOH HA Provide a step-wise mechanism for the following equation, show intermediates and arrows for exchange of electrons.4.) Use retrosynthetic analysis to show how hex-3-yne can be prepared from acetylene and any other organic and inorganic compounds. Then draw the synthesis in the synthetic direction, showing all needed reagents. mopeatane to athy alkene tat occus via a syn ion and drevs on occurs vi an anti addition d dras ia stte wote out two resctions on that Markov addition and notha tht kov parloway 5.) Devise a synthesis of CH3CH2CH2CHO from two-carbon starting materials. Draw both the retrosynthesis and the forward synthesis.
- For each of the following pairs of species, which is the stronger nucleophile in ethanol? Explain. (a) H3C-OH or H,C-o° (b) H3C-OH or H;C-NH, (c) or (d) (е) CH3S` CH3SE (f) CH;Se or or BrThe key step in a reported laboratory synthesis of sativene, a hydrocarbon isolated from the mold Helminthosporium sativum, involves the following base treatment of a keto tosylate. What kind of reaction is occurring? How would you complete the synthesis?Plastic photochromic sunglasses are based on the following reversible rearrangement of a dye inside the lenses that occurs when the lenses are exposed to sunlight. The original dye absorbs UV light but not visible light and is thus colorless, while the rearrangement product absorbs visible light and is thus darkened. (a) Show the mechanism of the rearrangement. (b) Why does the rearrangement product absorb at a longer wavelength (visible light) than the original dye (UV)?
- (4) Starting from a single carbon, showing all Hhe balance reactions and electron trans fer by arrows, synthesiged O Nephtkalone O Anthracene HOUOV TYNYAS19. Mechanism cat. TSOH H. CH;OHPropose a mechanism for this reaction. || » CH3COCH=CH, H,SO4 HC=CH + CH3COH H9SO4 Acetylene Acetic acid Vinyl acetate Vinyl acetate is the monomer for the production of poly(vinyl acetate), the major use of which is as an adhesive in the construction and packaging industry, but it is also used in the paint and coatings industry.