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Maillard reaction is related to aroma, taste and colour, in cooking like roasting of coffee and
cocoa beans, baking of bread and cakes, toasting of cereals and cooking of meat.
In early stage, sugar-amine condensation withareducingsugar(glucose) andamines( aminoacids)
reactionto forman N-substitutedglycosylamine.
N-substitutedglycosylamine undergoesAmadori rearrangement, toformketosamine( Amadori
compound )
The furtherreactionof Amadori productdependsonthe pH of the system.
In acidicpH (lessthan7), itforms1,2 enolisationtoformfurfurals(incase of pentoses) or
hydromethylfurfural (incase of hexose).
In basicpH (above 7),2,3 enolisationoccurstoform reductones (enediolswithacarbonyl group
adjacentto the enediol group,)like4-hydroxy-5methyl-2,3dihydrofuram-3-one orfuraneol (2,5-
Dimethyl-4-hydroxy-furan-3-one) ,anda varietyof fissionproductslikeacetol (hydroxyacetone),
pyruvaldehyde anddiacetyl form.
inbasic pH, fission productslike acetol,pyruvaldehyde anddiacetyl alsoforms.
The dicarbonyl compoundscanfurtherreactwithaminoacids to formaldehydesandα aminoketones
by Streckerdegradation.
A wide range of streckeraldehydesare formedwithdistinctaromas.
Amino acid (R) Strecker aldehyde formed(R) odour
Valine
2 methyl propanal Greenoverripe fruit
Leucine
3 methyl butanal
Malty toastedfruitybread
Isoleucine
2 methyl butanal Fruitysweetroasted
phenylalanine
phenylacetaldehyde Greenfloral hyacinth
Methionine Methional Vegetablelikearomas
Cysteine Mercaptoaldehyde, Meat like aroma
https://slideplayer.com/slide/10420918/
https://www.brewersjournal.ca/2017/05/18/science-malliard-reaction/
but pyrrole reactsina differentmannerwithaldehydes,toform1-pyrroline andpyrrolidines. These are
importantintermediatesinbreadlike aromas.
Maillard reaction - a very brief overiew

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Maillard reaction - a very brief overiew

  • 1. Maillard reaction is related to aroma, taste and colour, in cooking like roasting of coffee and cocoa beans, baking of bread and cakes, toasting of cereals and cooking of meat. In early stage, sugar-amine condensation withareducingsugar(glucose) andamines( aminoacids) reactionto forman N-substitutedglycosylamine. N-substitutedglycosylamine undergoesAmadori rearrangement, toformketosamine( Amadori compound ) The furtherreactionof Amadori productdependsonthe pH of the system. In acidicpH (lessthan7), itforms1,2 enolisationtoformfurfurals(incase of pentoses) or hydromethylfurfural (incase of hexose).
  • 2. In basicpH (above 7),2,3 enolisationoccurstoform reductones (enediolswithacarbonyl group adjacentto the enediol group,)like4-hydroxy-5methyl-2,3dihydrofuram-3-one orfuraneol (2,5- Dimethyl-4-hydroxy-furan-3-one) ,anda varietyof fissionproductslikeacetol (hydroxyacetone), pyruvaldehyde anddiacetyl form. inbasic pH, fission productslike acetol,pyruvaldehyde anddiacetyl alsoforms.
  • 3. The dicarbonyl compoundscanfurtherreactwithaminoacids to formaldehydesandα aminoketones by Streckerdegradation. A wide range of streckeraldehydesare formedwithdistinctaromas. Amino acid (R) Strecker aldehyde formed(R) odour Valine 2 methyl propanal Greenoverripe fruit Leucine 3 methyl butanal Malty toastedfruitybread Isoleucine 2 methyl butanal Fruitysweetroasted phenylalanine phenylacetaldehyde Greenfloral hyacinth Methionine Methional Vegetablelikearomas Cysteine Mercaptoaldehyde, Meat like aroma https://slideplayer.com/slide/10420918/ https://www.brewersjournal.ca/2017/05/18/science-malliard-reaction/ but pyrrole reactsina differentmannerwithaldehydes,toform1-pyrroline andpyrrolidines. These are importantintermediatesinbreadlike aromas.