作者:Chu-Biao Xue、William F. DeGrado
DOI:10.1016/0040-4039(94)02210-3
日期:1995.1
Nα-Boc-Nα-methyl-Nω,ω′-bis(benzyloxycarbonyl)-L-arginine and Nα-Boc-Nα-methyl-Nδ-benzyloxycarbonyl-L-ornithine have been synthesized starting with Boc-L-Gln. The γ-carboxamide of Boc-L-Gln was dehydrated to a nitrile group and the resulting compound is selectively methylated providing N-Boc-2-methylamino-4-cyanobutyric acid. The nitrile is then reduced to an amine furnishing the key intermediate N
Ñ α -Boc- Ñ α甲基Ñ ω,ω ' -双(苄氧羰基) -大号-精氨酸和Ñ α -Boc- Ñ α甲基Ñ δ苄氧基羰基大号鸟氨酸开始的Boc-已经合成L- Gln。将Boc- L -Gln的γ-羧酰胺脱水成腈基,然后将生成的化合物选择性地甲基化,得到N -Boc-2-甲基氨基-4-氰基丁酸。然后将腈还原成胺家具关键中间体Ñ α -Boc-Ñ α甲基大号鸟氨酸。