Stereoselective Syntheses of (<i>E</i>)-α,β-Didehydroamino Acid and Peptide Containing Its Residue Utilizing Oxazolidinone Derivative
作者:Miki Kometani、Kohki Ihara、Rumi Kimura、Hideki Kinoshita
DOI:10.1246/bcsj.82.364
日期:2009.3.15
Reaction of methyl N-Boc-N-phenoxycarbonylglycinate with various aldehydes afforded the corresponding cis-4,5-oxazolidinone derivatives, which were effectively converted to (E)-α,β-didehydroamino acids by means of a base. Furthermore, N-deprotection of the oxazolidinone derivatives and subsequent coupling reaction with Boc-amino acid furnished the corresponding dipeptides, which were transformed to dipeptide containing α,β-didehydroamino acid with high E selectivity.
甲基 N-Boc-N-苯氧羰基甘氨酸盐与各种醛反应,生成了相应的顺式-4,5-恶唑啉酮衍生物,这些衍生物通过碱处理有效地转化为(E)-α,β-二脱氢氨基酸。此外,恶唑啉酮衍生物的去N保护以及随后与Boc-氨基酸的偶联反应生成了相应的二肽,这些二肽被转化为含有高E选择性的α,β-二脱氢氨基酸的二肽。