Synthesis of 2-substituted bicyclo[1.1.0]butanes <i>via</i> zincocyclopropanation using bromoform as the carbenoid precursor
作者:Léa Thai-Savard、André B. Charette
DOI:10.1039/d3cc00335c
日期:——
Through a revisited Simmons–Smith type zincocyclopropanation using bromoform as the carbenoid source, the synthesis of 2-, 2,2- and 2,4-substituted bicyclo[1.1.0]butanes is reported. Few antecedents of the derivatives have yet been described. Ultimately, the underexplored scaffolds exhibited a complete discrepency of reactivity.
2-(2-Pyridyldithio-3-butenyl) glycosides react with carbohydrate-based thiols in a two-step process involving sulfenyl transfer followed by desulfurative 2,3-allylic rearrangement, promoted by either triphenylphosphine or silver nitrate, to give novel saccharide mimetics. In an alternative embodiment of the same chemistry anomeric thiols are coupled with carbohydrates derivatized in the form of 2-