| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
|---|---|---|---|---|
| N-苄氧羰基-N-甲基-L-缬氨酸 | Z-MeVal-OH | 42417-65-2 | C14H19NO4 | 265.309 |
| (4S)-4-异丙基-5-氧代-1,3-恶唑烷-3-羧酸苄基酯 | (4S)-4-isopropyl-5-oxo-1,3-oxazolidine-3-carboxylic acid benzyl ester | 66866-64-6 | C14H17NO4 | 263.293 |
| CBZ-L-缬氨酸 | (S)-N-(benzyloxycarbonyl)valine | 1149-26-4 | C13H17NO4 | 251.282 |
| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
|---|---|---|---|---|
| —— | (3S)-4-methyl-3-(methyl{[(phenylmethyl)oxy]carbonyl}amino)pentanoic acid | 914939-75-6 | C15H21NO4 | 279.336 |
N-Methyl β-amino acids are potentially useful amino acid derivatives for incorporation in lead peptide therapeutics. The syntheses of five such compounds are presented. Their synthesis via 6-oxazinanones was low yielding. Alternatively, reductive cleavage of a 5-oxazolidinone gave the N-methyl α-amino acid, which was then homologated via an Arndt–Eistert procedure in high yield to give the N-methyl β-amino acid.
Results from studies of the Arndt–Eistert homologation of N-methyl-α-amino acids with concomitant ester and amide formation is discussed. The applicability of the use of ultrasound was investigated in the Wolff rearrangement of diazoketones for the production of esters and amides. This methodology was then applied to a novel ‘N-methyl coupling’ that allows simultaneous β-amino acid formation. Conventional ‘PyBroP N-methyl couplings’ were also performed as a comparison to establish the validity of the method.