Synthesis of N-heterocycles via lactam-derived ketene aminal phosphates. Asymmetric synthesis of cyclic amino acids.

1998 ◽  
pp. 1757-1758 ◽  
Author(s):  
K. C. Nicolaou ◽  
Kenji Namoto
Keyword(s):  
Amino Acids ◽  
Asymmetric Synthesis ◽  
Cyclic Amino Acids

ChemInform Abstract: Asymmetric Synthesis of Chiral Cyclic Amino Acids by Diels-Alder Reactions of (2S)- and (2R)-4-Methyleneoxazolidin-5-ones.

ChemInform ◽  
2010 ◽  
Vol 24 (20) ◽  
pp. no-no
Author(s):  
S. G. PYNE ◽  
B. DIKIC ◽  
P. A. GORDON ◽  
B. W. SKELTON ◽  
A. H. WHITE
Keyword(s):  
Amino Acids ◽  
Asymmetric Synthesis ◽  
Diels Alder ◽  
Cyclic Amino Acids

Asymmetric\ Synthesis of Chiral Cyclic Amino Acids by Diels-Alder Reactions of (2S)- and (2R)-4-Methyleneoxazolidin-5-ones

1993 ◽  
Vol 46 (1) ◽  
pp. 73 ◽  
Author(s):  
SG Pyne ◽  
B Dikic ◽  
PA Gordon ◽  
BW Skelton ◽  
AH White
Keyword(s):  
Amino Acids ◽  
Carboxylic Acid ◽  
Single Crystal ◽  
Asymmetric Synthesis ◽  
Enantiomeric Purity ◽  
Diels Alder ◽  
X Ray ◽  
Cyclic Dienes ◽  
Ray Methods ◽  
Cyclic Amino Acids

The synthesis of chiral (2S)- and (2R)-4-methyleneoxazolidin-5-ones, in high enantiomeric purity from (S)-S- methylcysteine, and their highly exo-selective Diels -Alder reactions with cyclic dienes are described. (1R,2S,4S)-2-Aminobicyclo[2.2.1]heptane-2-carboxylic acid has been prepared in 92% e.e. by these methods. A number of the products have been characterized by single-crystal X-ray methods, and their structure systematics examined.

Asymmetric Synthesis of Tetrasubstituted Cyclic Amines via Aza-Henry Reaction using Cinchona Alkaloid Sulfonamide/Zinc(II) Catalysts

2022 ◽  
Author(s):  
Naoki Yasukawa ◽  
Ami Yamanoue ◽  
Tsunayoshi Takehara ◽  
Takeyuki Suzuki ◽  
Shuichi Nakamura
Keyword(s):  
Amino Acids ◽  
Asymmetric Synthesis ◽  
Cinchona Alkaloid ◽  
Henry Reaction ◽  
Cyclic Amines ◽  
Cyclic Amino Acids

The first enantioselective aza-Henry reaction of non-activated cyclic iminoesters, derived from cyclic amino acids, has been developed. Good yields and enantioselectivities were observed for the reaction using our original cinchona...

Use of hydrolases for the synthesis of cyclic amino acids

Tetrahedron ◽  
2004 ◽  
Vol 60 (3) ◽  
pp. 717-728 ◽  
Author(s):  
Richard C Lloyd ◽  
Michael C Lloyd ◽  
Mark E.B Smith ◽  
Karen E Holt ◽  
Jonathan P Swift ◽  
...  
Keyword(s):  
Amino Acids ◽  
Cyclic 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
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