N-(Benzoyloxy)amines: an investigation of their thermal stability, synthesis, and incorporation into novel peptide constructs
作者:Anne Nemchik、Valentina Badescu、Otto Phanstiel
DOI:10.1016/s0040-4020(03)00635-5
日期:2003.6
were pyrolyzed and their decomposition temperatures correlated well with the amine architecture's ability to stabilize a N-centered radical. A variety of amine substrates were treated with a biphasic mixture of benzoyl peroxide (BPO), CH2Cl2 and an aqueous carbonate buffer (at pH 10.5). Primary and secondary amines were successfully N-benzoyloxylated in good yield. Tertiary amines and BPO gave low yields
一系列N-苯甲酰氧基胺被热解,其分解温度与胺结构稳定N-中心自由基的能力密切相关。用过氧化苯甲酰(BPO),CH 2 Cl 2和碳酸盐水溶液(pH 10.5)的双相混合物处理各种胺底物。伯胺和仲胺成功地以良好的产率被N-苯甲酰氧基化。叔胺和BPO可能通过自由基分解产生了低含量的相应N-氧化物和复杂的产物混合物。电子不足的胺(例如氟化脂肪族胺,α-氨基酸,α-氨基酯和α-氨基酰胺)不是N在这些条件下被-苯甲酰氧基化。相反,用氟化胺观察到N-苯甲酰化,并且反应对温度和水性介质的pH敏感。的一锅-两步合成Ñ α -Fmoc -1- Leu- Ñ β - (苯甲酰氧基)-β-丙氨酸乙酯,同时含有α-和β新颖氨基酸框架的肽,也发达。