Fluorous Boc (<sup>F</sup>Boc) Carbamates: New Amine Protecting Groups for Use in Fluorous Synthesis
作者:Zhiyong Luo、John Williams、Roger W. Read、Dennis P. Curran
DOI:10.1021/jo010111w
日期:2001.6.1
fluorous variants of the Boc (tert-butyloxycarbonyl) group have been prepared and tested for their suitability as nitrogen protecting groups. A group with two fluorous chains and an ethylene spacer, (RfCH2CH2)2(CH3)COC(O)-, was readily attached to a representative amine but was difficult to cleave. In contrast, groups with two fluorous chains and a propylene spacer, (RfCH2CH2CH2)2(CH3)COC(O)-, or one fluorous
已经制备了Boc(叔丁氧基羰基)基团的第一个氟代变体,并测试了它们作为氮保护基的适用性。具有两个氟链和一个乙烯间隔基的基团(RfCH2CH2)2(CH3)COC(O)-易于连接到代表性的胺上,但难以裂解。相反,容易形成具有两个氟链和一个丙烯间隔基(RfCH2CH2CH2)2(CH3)COC(O)-的基团,或一个氟链和一个乙烯间隔基(RfCH2CH2)(CH3)2COC(O)-的基团。并分裂。(F)Boc基团的氟代醇组分可以通过蒸发除去,并且可以回收和再利用。在16和96种化合物库合成练习中证明了新的(F)Boc基团(C8F17CH2CH2)(CH3)2COC(O)-的实用性。分离可以通过手动,并行氟固相萃取或自动,串联荧光色谱。结果进一步证实了“轻型”氟合成技术的价值,新的氟Boc基团将氟合成技术的应用范围扩展到了许多类别的含氮有机化合物。