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- Primary amines can also be prepared by the reaction of an alkyl halide with azide ion, followed by catalytic hydrogenation. What advantage do this method and the Gabriel synthesis have over the synthesis of a primaryamine using an alkyl halide and ammonia?会ll l 618527...5289_2 > By using reductive amination show how could prepare the following organic compound? Use all possible starting material 目Following is a synthesis for toremifene, a nonsteroidal estrogen antagonist whose structure is closely related to that of tamoxifen. (a) This synthesis makes use of two blocking groups, the benzyl (Bn) group and the tetrahydropyranyl (THP) group. Draw a structural formula of each group and describe the experimental conditions under which it is attached and removed. (b) Discuss the chemical logic behind the use of each blocking group in this synthesis. (c) Propose a mechanism for the conversion of D to E. (d) Propose a mechanism for the conversion of F to toremifene. (e) Is toremifene chiral? If so, which of the possible stereoisomers are formed in this synthesis?
- As far back as the 16th century, South American Incas chewed the leaves of the coca bush, Erythroxylon coca, to combat fatigue. Chemical studies of Erythroxylon coca by Friedrich Wöhler in 1862 resulted in the discovery of cocaine, C17H21NO4, as the active component. Basic hydrolysis of cocaine leads to methanol, benzoic acid, and another compound called ecgonine, C9H15NO3. Oxidation of ecgonine with CrO3 yields a keto acid that readily loses CO2 on heating, giving tropinone. (a) What is a likely structure for the keto acid? (b) What is a likely structure for ecgonine, neglecting stereochemistry? (c) What is a likely structure for cocaine, neglecting stereochemistry?There are three steps in Somfai's short synthesis of the alkaloid, stemoamide. Supply the missing reagents and products in this three-reaction sequence in the middle of the synthesis. H. 1) I-B: BRZNCH2CO2ET Grubbs-II P Q R CH2CI2 (Ph3P)4Pd THF-DMPU, A 2) НОАС C11H16|NO C15H23NO3 C13H19NO3Propose the structure of a starting material that would allow you to use the procedures given to synthesize acetaminophen
- Primary amines can also be prepared by the reaction of an alkyl halide with azide ion, followed by catalytic hydrogenation. What advantage do this method and the Gabriel synthesis have over the synthesis of a primary amine using an alkyl halide and ammonia?3) Draw equations of the following reactions and and explain to which direction is the respective quillibrium shifted. a) cyclohexylamine + water b) aniline + sulphuric acid c) triethylamine + acetic acid1. Show the products of the reductive amination reactions below; a) Acetone + NH3, followed by H2/Ni2 b) Acetone + CH3NH2, followed by LIBH3CN c) Acetone + (CH3)2NH, followed by LIBH3CN 2. Write the reaction and the names of the products formed in the reaction of aniline and N-methylaniline with: a) NaNO3+HCI followed by CuClI b) NaNO3+HCI followed by Cu20, Cu2*, H20
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