There are 20 commonly occurring amino acids from which all proteins are derived, although many other less common aminoacids have been isolated from natural sources. Valine is one of the 20 common amino acids, and it was used as a startingmaterial in the laboratory synthesis of an uncommon amino acid. During one of the steps in the synthesis, compound 1 wastreated with HBr under conditions that favor radical addition, giving stereoisomers 2 and 3.H.OCH3HBr2 + 3hv(S)-valineDraw the structures of 2 and 3.

Answered: There are 20 commonly occurring amino…

Chemistry

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ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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There are 20 common, naturally occurring amino acids from which all proteins are derived (as will be discussed in Chapter 25), although many other less common amino acids have been isolated from natural sources. Valine is one of the 20 common amino acids, and it was used as a starting material in the laboratory synthesis of an uncommon amino acid (Tetrahedron 1997, 53, 1151-1156). During one of the steps in the synthesis, compound 1 was treated with HBr under conditions that favor radical addition, giving stereoisomers 2 and 3. Draw the structures of 2 and 3, and describe their stereoisomeric relationship. H. LOCH3 HBr 2 + 3 hv H (S)-valine Modify the given copies of compound 1 to drawthe structures of 2 and 3. You can use the single bond tool to add/remove double bonds. CH2 CH2 H,C- H3C- -CH, -CH, Edit Drawing Describe the relationship of 2 and 3. O They are enantiomers. O They are superimposable. They are diastereomers. O They are constitutional isomers.
CH2023 Q2(a)
please answer all correctly
Show the isomers of alkyne with 5C and indicate BOTH C.N & I.N.
Give the following1. an amino acid that has an aryl side group chain 2. an amino acid that contains a side chain with a thioether bond3. an amino acid that reacts with HCL through acid-base reaction4. an amino acid that contains a sulfhydryl side chain5. an amino acid with a side chain that can form hydrogen bonds with water6. an amino acid that contains an amide side chain
Draw a pentapeptide, peptide sequence: IENAP Show the position of all 'heavy' atoms with the appropriate letter (C, N, O, S etc.) and indicate the number of attached hydrogen atoms (no skeletal structures allowed).- Show the chirality of the alpha carbon of every residue as the L isomer (not required for Glycine). All trigonal planar groups must be shown explicitly with appropriate geometry. • Show all double bonds and/or partial double bonds. • Draw all ionisable groups as their most highly populated state at pH 7.4 Make the peptide bond between the fourth residue and proline the cis isomer.- Show all other peptide bonds as trans.e
G.233.
Ethyleneimine reacts with cysteine side chains in proteins to form S - aminoethyl derivatives. The peptide bonds on the carboxyl side of these modified cysteine residues are susceptible to hydrolysis by trypsin . Why?
One of the following statements is incorrect in using Simmons-Smith reagent to prepare cyclopropane: а. Zn(Cu) reacts with CH212 in ether to yield iodomethylzinc iodide, ICH2ZNI. b. ICH2ZNI reacts with an alkene in ether to form a O cyclopropane С. ICH21 is a "carbenoid" since it resembles carbene (:CH2) chemically. d. The reaction is not stereospecific
2. Briefly explain the application of the functional group "Cis-Trans isomers for night vision" and include examples of these compounds. 3. Briefly explain the application of the functional group "Hydrogenation of unsaturated fats" and include examples of these compounds. 4. Briefly explain the application of the functional group "Some common aromatic compounds" and include examples of these compounds. Brioftu ealsin
2)
This is an organic chemistry question. PLEASE SHOW STEP BY STEP, WITH ARROWS! ALSO PLEASE INCLUDE ALL ELECTRON LONE PAIRS AND CHARGES FOR STRUCTURES IF NECESSARY!

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