A New Synthetic Method for Dipeptides Containing α,β-Didehydroamino Acids Utilizing an α-Tosylglycine Residue
作者:Yohsuke Shiraishi、Hiroshi Yamauchi、Takashi Takamura、Hideki Kinoshita
DOI:10.1246/bcsj.77.2219
日期:2004.12
The reaction of peptides containing an N-Boc- or N-Z-α-tosylglycine residue at the N-terminus with a variety of excess nitro compounds under basic conditions to give the nitro compound-adducts in good yields, followed by the elimination of nitrous acid from the adducts to afford the corresponding dipeptide containing α,β-didehydroamino acids with (Z)-configuration predominantly. Treatment of the same
在 N 末端含有 N-Boc- 或 NZ-α-甲苯磺酰甘氨酸残基的肽在碱性条件下与各种过量的硝基化合物反应,以良好的产率得到硝基化合物加合物,然后消除亚硝酸从加合物得到相应的二肽,其中主要含有 (Z)-构型的 α,β-二脱氢氨基酸。在碱和三丁基膦的存在下用醛处理相同的起始材料也以令人满意的产率得到了具有高 (Z) 选择性的含有 α,β-二脱氢氨基酸的二肽。本方法可成功应用于保护亮氨酸脑啡肽类似物的合成。