Which of the following (from Figure #22) is/are the product(s) obtained from the sodium borohydride (NaBH4) reduction of D-tagatose? HO HO H CH₂OH 110 Figure #22 CH₂OH D-tagatose H -H CH₂OH Ha H -OH HO -OH ठ structure A OH -H CH₂OH HO HO H- HC=0 -H -H OH CH₂OH structure B Please click here if image does not display. HO- HO- Both structure C and structure D are the products. Structure B is the product. Both structure A and structure B are the products. O Structure C is the product. H- CH₂OH -OH H -H OH CH₂OH structure C HO HO HO H- CH₂OH -H H -H -OH CH₂OH structure D

Which of the following (from Figure #22) is/are the product(s) obtained from the sodium borohydride (NaBH4) reduction of D-tagatose? HO HO H CH₂OH 110 Figure #22 CH₂OH D-tagatose H -H CH₂OH Ha H -OH HO -OH ठ structure A OH -H CH₂OH HO HO H- HC=0 -H -H OH CH₂OH structure B Please click here if image does not display. HO- HO- Both structure C and structure D are the products. Structure B is the product. Both structure A and structure B are the products. O Structure C is the product. H- CH₂OH -OH H -H OH CH₂OH structure C HO HO HO H- CH₂OH -H H -H -OH CH₂OH structure D

Introduction to General, Organic and Biochemistry

11th Edition

ISBN:9781285869759

Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres

Publisher:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres

Chapter20: Carbohydrates

Section: Chapter Questions

Problem 20.58P

See similar textbooks

Similar questions

Shown here is a/anglycosidic linkage. CH₂OH CH₂OH I OH Н OH Н O Alpha Beta OL- O D- О Н I ОН HO OH -О Н Н H OH OH
Which one of the following is an epimer of D- mannose? * D-Aldose H. H-C-OH HO-C-H H-C-OH H-C-OH H-C-OH HO-C-H HO-C-H H-c-OH H-C-OH CH,OH H-C-OH HO-C-H но-с-н H-C-OH H-C-OH HO-C-H HO-C-H HO-C-H H-C-CH H-C-OH HO-ċ-H HO-C-H HO-C-H H-C-OH HO-C-H H-C-OH H-c-OH CH,OH H-C-OH H-C-OH H-C-OH H-C-OH CH,OH H-C-OH H-C-OH ČH,OH CH,OH CH,OH CH,OH CH,OH D-Allose D-Altrose D-Gucose D-Mannose D-Gulose D-idose D-Galactose D-Talose D-Gullose D-Glucose D-Allose L-Allose L-Mannose How are the given molecules related? * They have different molecular formulas Diastereomers Structural isomers Identical Enantiomers
Write the structure(s) for the organic product(s) of the carbohydrate reaction below. ball & stick v + labels HOCH2 Ag20 in aq. NH3 OH or Br2 in H20, pH 6 HO OH a-D-glucopyranose • Use the wedge/hash bond tools to indicate stereochemistry where it exists. If two diastereomers are formed, draw both. • If no reaction occurs, draw the organic starting material. Draw carboxylic acids in neutral (unionized) form. • Use “flat" representations of rings, not chairs, in your drawing. Do not draw your answer as a Haworth projection.
Which of the following is the correct pair of monosaccharides needed 2 to form the given glycoside? * CH2OH CH-OH CH2OH OH он он OH OH a-D-fructofuranose & B-D-glucopyranose a-D-sorbofuranose & B-D-allopyranose a-D-mannofuranose & B-D-glucopyranose O a-D-sorbofuranose & B-D-galactopyranose
One pathway for the metabolism of D-glucose 6-phosphate is its enzyme-catalyzed conversion to D-fructose 6-phosphate. Show that this transformation can be accom- plished as two enzyme-catalyzed keto-enol tautomerisms. СНО CH,OH C=0 enzyme catalysis Но Но H OH H H. O- H- -HO- ČH,OPO, ČH,OPO, D-Glucose 6-phosphate D-Fructose 6-phosphate
Which of the following compound(s) is(are) epimer(s) of D-glucose? 重眶龜重 сно CHO CHO CHO но но H- H H- но- но но но -H но но- H- O- OH но H- H- OH но OH но CH2OH CH2OH CH2OH CH2OH a d. О a and b O a O b О a and c Оb and d
7. Why are protecting groups needed in this reaction and what is the purpose of CH2C12? Can you explain this reaction to me? I understand intermediate 10 will be a disaccharide. Bno Bno o co, Bno OAc NH TMSOTI (1,2)-linked tetramannoside 10 CH,Clz Bno. он Bno o Bno ROAI
Write the equation of reactions of Glucose+Cu(OH)2(heat) Glucose+HNO3 a-D-glucopyranose+(CH3CO)2O a-D-glucopyronase+CH3I
Is the carbohydrate shown a furanose or a pyranose? CH2OH H OH H. OH OH H.
3. Propose a mechanism for the conversion from ribulose5-5phosphate to ribose-5-phosphate using the arrow formalism. This is a reaction in the pentose phosphate pathway. CH2OH с-н Ribose 5-Phosphate Isomerase c=0 H-C-OH Н-с-ОН Н-с-ОН Н-с-он Н-с-ОН H2C-OPO,2 H2C-OPO, Ribulose-5-Phosphate Ribose-5-Phosphate
4. Draw the beta-furanose form of the following carbohydrate CHO H- HO -H 6. OH CH₂OH 5. Draw the alpha-pyranose of the following carbohydrate CHO -H H -OH H -OH HO HO H HO Draw the alpha-pyranose of the following carbohydrate CH₂OH H- CHO -H -OH H -ОН CH₂OH
5. Which two D-pentose sugars give optically active alditols when reduced with NABH4 CHO н— он CH2OH D-glyceraldehyde. Сно CHO H HOH H HOH CH2OH „D-erythrose HO H H HOH ČH2OH D-threose CHO CHO CHO CHO -OH HO-H H OH Но -O- H +OH но -H но- H- HFOH CH2OH H- -OH H +OH H FOH CH2OH CH2OH ČH2OH D-ribose D-arabinose D-хylose D-lyхose CHO CHO CHO CHO Сно CHO CHO CHO HO-H HO-H HO-H H HOH но—н но—н H FOH H HOH H +OH HO-H H FOH H- -O- HO-H но- H OH H- -O- но но—н H FOH HO-H H +OH CH2OH H HOH H -OH H HOH H FOH но FH HHOH ČH2OH HHOH ČH2OH H- -OH H -OH H- -OH -OH ČH2OH ČH2OH CH2OH CH2OH ČH2OH D-allose D-altose D-glucose D-mannose D-gulose D-idose D-galactose D-talose