Number of possible ketoses n number of asymetric C atoms (ACA) C3 0ACA 20=1 C4 中 1 ACA 2=2 C5 b 2ACA 22=4 C6 3 ACA 中 23=8
Number of possible ketoses n = number of asymetric C atoms (ACA)
E 3-Allore 2-Nhare 3-slarore 3-kisulere 9-Xylulare 3-Kylers 一华 如nt乎n 3-siyeerinoleebya L-Stvearinoldehrd
3 C atoms 4 C atoms 5 C atoms =0 0 0 .0 0 H-C-OH HO-C-H H-C-OH HO-C-H H-C-OH HO-C-H H-C-OH H-C-OH HO-C-H HO-C-H H-C-OH H-C-OH H-C-OH H-C-0H H-C-OH H-C-OH H-C-OH CH2OH CH OH CH2OH CH2OH CH2OH CH2OH CH2OH D-Glycerinaldehyd D-Erythrose D-Threose D-Ribose D-Arabinose D-Xylose D-Lyxose 6 C atoms H 0 H 0 H 0 ● H-C-OH HO-C-H H-C-OH HO-C-H H-C-OH HO-C-H H-C-OH HO-C-H H-C-OH H-C- OH HO-C-H HO-C-H H-C-OH H-C-OH HO-C-H HO-C-H H-C- OH H OH H-C OH H-C-OH HO-C-H HO-C-H HO-C-H HO-C-H H-C-OH H-C-OH H-C-OH H-C-OH H-C-OH H-C-OH H-C-OH H-C-OH CHOH CH OH CH OH CH,OH CH OH CH OH CH OH CH2OH D-Allose D-Altrose D-Glucose D-Mannose D-Gulose D-Idose D-Galactose D-Talose (a)
3 C atoms 4 C atoms 5 C atoms 6 C atoms
Mirror images=Enantiomers -C H HC-OH HO-CH D-Erythrose L-Erythrose HC-OH HO-CH H2C-OH H2C-OH Epimers H H HO-CH HC-OH D-Threose L-Threose HC-OH HO-CH H2C-OH H2C-OH
C HC HC H2 C OH OH OH O H D-Erythrose C CH CH H2 C OH HO HO O H L-Erythrose C HC CH H2 C OH HO OH O H L-Threose D-Threose C CH HC H2 C OH OH HO O H Mirror images = Enantiomers Epimers
HO CH2 HC-OH OH HO-CH HC-OH → HC-OH--- HO anomeres H2C-OH C-Atom D-Glucose (Fischer Projektion) CH2OH 0 OH B-D-Glucopyranose OH (Haworth Projektion) OH
D – Glucose (Fischer Projektion) ß-D-Glucopyranose (Haworth Projektion) C HC CH HC OH HO OH O H HC H2 C OH OH C HC CH HC OH HO OH O H HC H2 C OH OH C C C C C O HO CH2 1 HO HO OH OH H anomeres C-Atom