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。