A versatile, synthesis of β-amino acids using the Nicholas reaction. I. Application to β-lactams of the carbapenem class
作者:Peter A. Jacobi、Wanjun Zheng
DOI:10.1016/s0040-4039(00)77630-1
日期:1993.4
Homochiral acetylenic acids of general structure 10, prepared using the Schreiber modification of the Nicholas reaction, have been converted to β-amino acid derivatives of type 11 by a two steps sequence involving Curtius rearrangement followed by oxidative cleavage of the acetylenic bond. Amino acid derivatives 11 are excellent precursors for β-lactams of the carbapenem class.
α-Alkylation of β-aminobutanoates with lk-1.2-induction
作者:Dieter Seebach、Heinrich Estermann
DOI:10.1016/s0040-4039(00)96296-8
日期:1987.1
Formal Total Syntheses of the β-Lactam Antibiotics Thienamycin and PS-5
作者:Peter A. Jacobi、Shaun Murphree、Frederic Rupprecht、Wanjun Zheng
DOI:10.1021/jo952092u
日期:1996.1.1
Chiral nonracemic acetylenic acids of general structure 11, prepared using the Schreiber modification of the Nicholas reaction, have been converted to beta-amino acid derivatives of type 12 by a two-step sequence involving Curtius rearrangement followed by oxidative cleavage of the acetylenic bond. Amino acid derivatives 12 are excellent precursors for beta-lactams of the carbapenem class, including the important antibiotics thienamycin (1) and PS-5 (4).
Enzymatic Resolution of α-Alkyl β-Amino Acids Using Immobilized Penicillin G Acylase