13.43 Treatment of propylbenzene with NBS + hv affords a single constitutional isomer. Suggest a structure for the product and a reason for its formation. propylbenzene
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- 17.4 Give the structure of the starting material. NaBH4 which functional group reacts with this reagent? what is the product? OH17.39 Using ethanol as the source of all the carbon atoms, describe efficient syntheses of each of the following, using any necessary organic or inorganic reagents: (c) (d) ა C 17.39 Using ethanol as the source of all the carbon atoms, describe efficient syntheses of each of the following, using any necessary organic or inorganic reagents: (d) CH3CHC CH OHSharpless epoxidation of allylic alcohol X forms compound Y. Treatment of Y with NaOH and C6H5SH in an alcohol–water mixture forms Z. Identify the structure of Y and draw a mechanism for the conversion of Y to Z. Account for the stereochemistry of the stereogenic centers in Z. Z has been used as an intermediate in the synthesis of chiral carbohydrates.
- Can you help6) 25pts. Draw the structure of the major alkene product (or products) formed by treatment of each of the following haloalkanes with sodium ethoxide in ethanol. Assume the mechanism is E2 elimination. t-BuO K t-BUOH Br CH3 Eto Na F ETOH CH2CH3 CI H- Eto Na -CH2CH3 ELOH H- ČH3 Br Eto Na ELOH CH3 CI, H Eto Na CH2CH3 H3C H D ELOH42 Draw the hemiacetal and then the acetal formed in each reaction. In each case, assume an excess of the alcohol. (D) 12 (a) Propanal+ methanol → (b) Cyclopentanone + methanol- Drow the at
- 18.18 2-Butene-1-thiol is one component of skunk spray. HoW would you synthe substance from methyl 2-butenoate? From 1,3-butadiene? CH;CH=CHCOCH3 2, CH;CH=CHCHSH Methyl 2-butenoate 2-Butene-1-thiol9.22 Predict the products from reaction of 1-hexyne with the following reagents: (b) 1 equiv Cl₂ (a) 1 equiv HBr (c) H₂, Lindlar catalyst (e) H₂O, H₂SO4, HgSO4 (d) NaNH₂ in NH3, then CH₂ Br (f) 2 equiv HCI 9.23 Predict the products from reaction of 5-decyne with the following reagents: (b) Li in NH3 (d) BH3 in THF, then H₂O₂, OH- (f) Excess H₂, Pd/C catalyst (a) H₂, Lindlar catalyst (c) 1 equiv Br₂ (e) H₂O, H₂SO4, HgSO4 9.26 Identify the reagents a-c in the following scheme: = 9.24 Predict the products from reaction of 2-hexyne with the following reagents: (b) 1 equiv HBr (a) 2 equiv Br₂ (c) Excess HBr (d) Li in NH3 (e) H₂O, H₂SO4, HgSO4An alkene is treated with OsO4 followed by H2O2. When the resulting diol is treated with HIO4, the only product obtained is an unsubstituted cyclic ketone with molecular formula C6H10O. What is the structure of the alkene?
- Draw a stepwise mechanism for the following reaction, one step in the synthesis of the cholesterol-lowering drug pitavastatin, marketed in Japan as a calcium salt under the name Livalo.Compound F may be synthesised by the method attached: When 2-chloropropane treated with NaOH and 1-chloropropane treated with NaOH separately produce two different functional groups. Provide both reactions and explain the two different functional groups produced.Bromoetherification, the addition of the elements of Br and OR to a double bond, is a common method for constructing rings containing oxygen atoms. This reaction has been used in the synthesis of the polyether antibiotic monensin (Problem 21.36). Draw a stepwise mechanism for the following intramolecular bromoetherification reaction. Br Br2 + HBr
