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- CH3 CH3 -H- CH3 CH3 HO H- Но- H- -ОН H- Но- -H- H- HO- H- -ОН HO H CH3 CH3 CH3 CH3 IV I II III9:PV : Organic chemistry 1 Assignment. (. 3 Which of the following groups has the highest priority according to the Cahn- * ?Ingold-Prelog sequence rules )1 نقطة( CH3 CH2OH O CHO CH2CI O How many chiral center the amoxicillin ? have )1 نقطة( NH2 H -N- HO СООН amoxicillin II エーそShow how the Cahn-Ingold-Prelog sequence rules are used to assign the configuration of the stereogenic centre as either R or S. Select the correct answers from the drop-down boxes. Be sure to answer all parts. Priority (select) Priority (select) V Y V V ?v 'C MeOC 'C ¹H 'C SC Configuration (select) 'H ¹H Priority (select) Priority (select)
- I. A. Name the following compounds as pyranose/furanose; Pyranoside/Furanoside; alfa/beta; Reducing/ non-reducing sugars CH2OH OH 1. он a. Furanose/furanoside/Pyranose/Pyranoside b. Alfa/beta c. Reducing/ non-reducing CH2OH OCH3 OH но 2. OH a. Furanose/furanoside/Pyranose/Pyranoside b. Alfa/beta c. Reducing/ non-reducing но H OCH3 OH 3. но a. Furanose/furanoside/Pyranose/Pyranoside b. Alfa/beta c. Reducing/ non-reducing CH2OH OH OH но 4. OH a. Furanose/furanoside/Pyranose/Pyranoside b. Alfa/beta c. Reducing/ non-reducing ÇH,OH CH,OH OH 5.Draw the mechanism for the acid-catalyzed cyclization of D-fructose to give B-D-fructofuranose. Step 1 Draw curved arrows and lone pairs for step 1 of the mechanism. . .... H. II C HO 叫 O: FOH+ HO- -H- HO НО- H-OH H,O H- OH H- O- CI H- H- HO- Br 1. HO HO P. it I +it +t +lНО 10. Which of the following is a chair structure of a-D-mannose? CHO HO-H HO-H H-OH Н -ОН CH₂OH D-mannoce НО. CH2OH (A) НО OH НО. OH CH OH OH (D) НО НО. -OH CH₂OH (В) OH OH OH НО НО- CH₂OH ОН (E) ОН CH2OH ОН OH OH
- CH OH CH OH CH,OH CHOH CH2 CHOH O OH OH CH2 HO OH C 3 CHOH OH OH OH OH OH OH OH OH Download Image... The oligosaccharide was subjected to exhaustive methylation followed by acid hydrolysis. The product obtained for manosaccharide A is O A. 1,2,3,4,6-penta-0-methylfructose O B. 2,3,4-tri-O-methyfructose OC 1,3,4,6-tetra-O-methylfructose O D.2,3,4,5-tetra-O-methylfructose P Type here to search3. Atazanavir (structure below) is an orally delivered AIDS-drug which works as an inhibitor for the HIV aspartyl protease. OH Meo. .N. N. OMe `Ph Atazanavir i) Draw the high energy intermediate of an aspartyl protease-catalysed cleavage of the amide bond in the peptide R1-CO-NH-R?. ii) How well does Atazanavir follow the Lipinski's rules of five (log P 4.5)? IZ IZCH2OH C=0 HC-OH Но-СH Но-СH ČH,OH For the compounds shown below identify the following: aldose, ketose, indicate chiral center (C numbering going from top to bottom as 1, 2, .etc.), potential pyranose, potential furanose, indicate anomeric carbon Aldose; Chiral Cs:C2, C3, C4; potential furanose; Anomeric C:C2 Aldose; Chiral Cs: C3, C4, C5: potential pyranose; Anomeric C:C2 Ketose; Chiral Cs: C3, C4, C5: potential furanose; Anomeric C:C2 Ketose: Chiral Cs:C2, C3, C4; potential pyranose; Anomeric C:C1 Ketose: Chiral Cs: C3, C4, C5: potential furanose; Anomeric C:C1 3.
- D-Xylose in aqueous solution exists in the pyranose form as a mixture of α and β anomers. Furanose and acyclic forms are present in negligible amounts and can be ignored. A sample of pure α-D-xylopyranose is dissolved in pure neutral water. The optical rotation is then measured immediately using a polarimeter. The specific rotation [??]?? is +93.6°. The optical rotation is then observed to decrease with the passage of time, and the solution is allowed to reach equilibrium. Eventually the specific rotation stabilises at [??]?? = +18.8°. The anomeric ratio at equilibrium a : β is 37 : 63. A sample of pure β-D-xylopyranose is not available. Using this information, predict the specific rotation of pure β-D-xylopyranose. Show how the a and β anomers equilibrate using a mechanism, assuming the presence of a trace amount of base as catalyst.Which of the following retrosyntheses is correct? also expalain itCH,OH H. H. H. H H. NH H. H. C%3D0 CH, Download Image... Which of the following best describes the the configuration and carbon atoms involved in of the glycosidic bond for the disaccharide unit? O A. beta (1- 1) O B. alpha (1 - 3) OC. alpha (1 -6) O D. alpha (1 4) O E. alpha (1-1) OF. beta (1 3) O G. beta (14) O H.beta (1 6) N N Type here to search