Halocyclization of Unsaturated Guanidines Mediated by Koser’s Reagent and Lithium Halides
作者:Marion Daniel、Florent Blanchard、Sophie Nocquet-Thibault、Kevin Cariou、Robert H. Dodd
DOI:10.1021/acs.joc.5b01750
日期:2015.11.6
The synthesis of halogenated cyclic guanidines through iodine(III)-mediated umpolung of halide salts is described. Cyclic guanidines of various sizes can be obtained with generally excellent regioselectivities through either a chloro- or a bromocyclization, using Koser’s reagent and the corresponding lithium salt.
通过碘(III)卤代环状胍的合成介导的极性转换卤化物盐的描述。使用Koser's试剂和相应的锂盐,可以通过氯环化或溴环化获得通常具有出色的区域选择性的各种大小的环状胍。