1. Rank the following nitrogens or amines in order of decreasing basicity (strongest to weakest, strongest = 1) a) `NH2 compare the basicity of three nitrogen in 1-methylhistamine b) `NH2 NH2 `NH2
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- (1) Which is the most basic amine and which is a secondary amine? (2) Which can undergo hydrolysis? (3) Which gives a diazonium salt upon reaction with HNO2, HCl at 0oC?Aliphatic amines are more basic than ammonia, whereas aromatic amines are less basic than ammonia. Is that true or false?(a) Explain why an alkylamine is more basic than ammonia?(b) How would you convert(i) Aniline to nitrobenzene (ii) Aniline to iodobenzene
- Each pair of compounds below can be separatedusing acid/base extraction. Provide the common acid or base that could be used to effect the separation. Amines can be converted into ammonium salts using acid, but neutral amines are very weak acids (pKa~ 35)and thus cannot be extracted by an aqueous base.The reaction of a nitrile with an alcohol in the presence of a strong acid forms an N-substituted amide. This reaction, known as the Ritter reaction, doesnot work with primary alcohols. a. Why does the Ritter reaction not work with primary alcohols? b. Provide an explanation for why an amide is less susceptible to nucleophilic attack than its corresponding ester.Safrole, which is isolated from sassafras (Problem 21.33), can be converted to the illegal stimulant MDMA (3,4- methylenedioxymethamphetamine, “Ecstasy”) by a variety of methods. (a) Devise a synthesis that begins with safrole and uses a nucleophilic substitution reaction to introduce the amine. (b) Devise a synthesis that begins with safrole and uses reductive amination to introduce the amine.
- Q1- From a-haloketone how can you prepared flowing compounds : Imidazole Oxazole Thiazole Q2: compared the acidity and basicity of Pyrazole and Imidazole with Pyrrole and Pyridine ?What does the reaction of 4-Chloropentan-2-amine reacted with excess CH3l, Ag2O produce? O Hofmann product only O Zaitsev product only O Both Hofmann and Zaitsev products Equal distributionWhat starting materials are needed to prepare each drug using reductive amination? Give all possible pairs of compounds when more than one route is possible.
- The resonance structure drawn in part A is _______the starting amide a. more important than b. equalivalent to c. less important thanArrange the members of each group in order of decreasing basicity: (a) Ammonia, aniline, methylamine (b) Acetanilide, aniline, N-methylaniline (c) 2,4-Dichloroaniline, 2,4-dimethylaniline, 2,4-dinitroaniline (d) 3,4-Dichloroaniline, 4-chloro-2-nitroaniline, 4-chloro-3-nitroaniline (e) Dimethylamine, diphenylamine, N-methylanilineAmino acids such as glycine are the building blocks of large molecules called proteins that give structure to muscle, tendon, hair, and nails. a.) Explain why glycine does not actually exist in the form with all atomsuncharged, but actually exists as a salt called a zwitterion. b.) What product is formed when glycine is treated with concentratedHCl?c.) What product is formed when glycine is treated with NaOH?