Asymmetric synthesis of topographically constrained amino acids: synthesis of the optically pure isomers of α,β-dimethyl-phenylalanine and α,β-dimethyl-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid

1991 ◽  
Vol 32 (41) ◽  
pp. 5769-5772 ◽  
Author(s):  
Wieslaw M. Kazmierski ◽  
Victor J. Hruby
Keyword(s):  
Amino Acids ◽  
Carboxylic Acid ◽  
Asymmetric Synthesis ◽  
Optically Pure ◽  
Constrained Amino Acids

Total asymmetric synthesis of highly constrained amino acids β-isopropyl-2′,6′-dimethyl-tyrosines

1997 ◽  
Vol 38 (29) ◽  
pp. 5135-5138 ◽  
Author(s):  
Yinglin Han ◽  
Subo Liao ◽  
Wei Qiu ◽  
Chaozhong Cai ◽  
Victor J. Hruby
Keyword(s):  
Amino Acids ◽  
Asymmetric Synthesis ◽  
Constrained Amino Acids

Asymmetric synthesis of unusual amino acids: Synthesis of optically pure isomers of β-methylphenylalanine

1989 ◽  
Vol 30 (49) ◽  
pp. 6841-6844 ◽  
Author(s):  
Ramalinga Dharanipragada ◽  
Ernesto Nicolas ◽  
Geza Toth ◽  
Victor J. Hruby
Keyword(s):  
Amino Acids ◽  
Asymmetric Synthesis ◽  
Unusual Amino Acids ◽  
Optically Pure

scholarly journals Diastereoselective Cyclopropanation by Using Camphorpyrazolidinone Derived α,β-Unsaturated Amides and Ylide

2020 ◽  
Author(s):  
sudershan gondi
Keyword(s):  
Carboxylic Acid ◽  
Asymmetric Synthesis ◽  
Michael Addition ◽  
Chemical Yield ◽  
High Chemical ◽  
Unsaturated Carboxylic Acid ◽  
Optically Pure ◽  
The Michael Addition

<p><b>Abstract:</b> High to moderate diastereoselectivity and high chemical yield are observed in the Michael addition of ylide and chiral camphorpyrazolidinone ylide to an optically pure a,b-unsaturated carboxylic acid derivatives derived from a chiral camphorpyrazolidinone and a,b-unsaturated carbonyl respectively. A novel route to the asymmetric synthesis of cyclopropanation derivatives is described.</p>

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