作者:Raymond C.F. Jones、John R. Nichols
DOI:10.1016/j.tet.2013.03.040
日期:2013.5
Alkylation of 4,5-dihydroimidazoles at C-2 is accomplished using a double umpolung of the reactivity of that position, via sulfenylation of a nucleophilic C-2 lithio-species and substitution using an alkyl nucleophile. Arylation via unexpected sulfide contraction from the arylsulfenylation products has also been demonstrated. Taken with dihydroimidazole cleavage protocols, this constitutes a tetra
使用该位置的反应性的双倍增强,通过亲核的C-2硫代物种的亚磺酰基化和使用烷基亲核试剂的取代,可实现该位置反应性的双倍提高,从而实现C-2上4,5-二氢咪唑的烷基化。还已经证明了来自芳基亚磺酰基化产物的意外的硫化物收缩引起的芳基化。采取二氢咪唑裂解方案,就构成了以四氢叶酸为灵感的C1转移方案。