Enantioselective synthesis of the carbacephem antibiotic loracarbef via Mitsunobu and Dieckmann cyclization from an unnatural amino acid
作者:Jerry W Misner、Jack W Fisher、John P Gardner、Steve W Pedersen、Kristina L Trinkle、Billy G Jackson、Tony Y Zhang
DOI:10.1016/s0040-4039(03)01483-7
日期:2003.8
The nucleus of the carbacephem antibiotic loracarbef was synthesized in a highly efficient and enantioselective fashion from 2S,3S-2-amino-3-hydroxy-6-heptenoic acid (AHHA), which was derived from enzyme-catalyzed condensation of glycine and 4-pentenaldehyde. The bicyclic framework of this compound was established through sequential Mitsunobu reaction and aldol condensations.
羧苄青霉素抗生素洛拉卡培的细胞核是由2 S,3 S -2-氨基-3-羟基-6-庚烯酸(AHHA)高效和对映选择性地合成的,AHHA是由酶催化的甘氨酸缩合而成。 4-戊醛。通过连续的Mitsunobu反应和醛醇缩合建立了该化合物的双环骨架。
Enantioselective Syntheses of 1-Carbacephalosporins from Chemoenzymically Derived β-Hydroxy-α-Amino Acids: Applications to the Total Synthesis of Carbacephem Antibiotic Loracarbef
作者:Billy G Jackson、Steve W Pedersen、Jack W Fisher、Jerry W Misner、John P Gardner、Michael A Staszak、Christopher Doecke、John Rizzo、James Aikins、Eugene Farkas、Kristina L Trinkle、Jeffrey Vicenzi、Matt Reinhard、Eugene P Kroeff、Chris A Higginbotham、R.J Gazak、Tony Y Zhang
DOI:10.1016/s0040-4020(00)00416-6
日期:2000.7
Serine hydroxymethyltransferase (SHMT) derived from recombinant E. coli was found to be able to catalyze the condensation between glycine and 4-pentenaldehyde, affording enantiopure l-erythro-2-amino-3-hydroxy-6-heptenoic acid (AHHA) in high yield and throughput. Conversion of this chiral intermediate of biosynthetic origin to the oral carbacephalosporin antibiotic loracarbef (Lorabid®) via β-lactam