(a)
Interpretation:
The
Concept introduction:
Asymmetric catalytic hydrogenation is a reaction in which the alkene substrate is reduced to a saturated compound by addition of two atoms of hydrogen. When chiral catalyst is used a enantioselective product is obtained. This technique uses a chiral catalyst so that the amino acids can be prepared with high enantiomeric excess.
The final step after hydrogenation is the hydrolysis of the protected group of
To find: the alkene taken for the synthesis of L-alanine using asymmetric catalytic hydrogenation.
(b)
Interpretation:
The alkenes required for the synthesis of given set of amino acids by asymmetric catalytic hydrogenation need to be identified.
Concept introduction:
Asymmetric catalytic hydrogenation is a reaction in which the alkene substrate is reduced to a saturated compound by addition of two atoms of hydrogen. When chiral catalyst is used a enantioselective product is obtained. This technique uses a chiral catalyst so that the amino acids can be prepared with high enantiomeric excess.
The final step after hydrogenation is the hydrolysis of the protected group of amine. The general scheme can be shown as,
To find: the alkene taken for the synthesis of L-alanine using asymmetric catalytic hydrogenation.
(c)
Interpretation:
The alkenes required for the synthesis of given set of amino acids by asymmetric catalytic hydrogenation need to be identified.
Concept introduction:
Asymmetric catalytic hydrogenation is a reaction in which the alkene substrate is reduced to a saturated compound by addition of two atoms of hydrogen. When chiral catalyst is used a enantioselective product is obtained. This technique uses a chiral catalyst so that the amino acids can be prepared with high enantiomeric excess.
The final step after hydrogenation is the hydrolysis of the protected group of amine. The general scheme can be shown as,
To find: the alkene taken for the synthesis of L-tyrosine using asymmetric catalytic hydrogenation.
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Chapter 25 Solutions
Organic Chemistry 3rd.ed. Klein Evaluation/desk Copy
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