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