Rhodium-Catalyzed Oxidative Synthesis of Quinoline-Fused Sydnones via 2-fold C–H Bond Activation
作者:Lei Li、He Wang、Xifa Yang、Lingheng Kong、Fen Wang、Xingwei Li
DOI:10.1021/acs.joc.6b02356
日期:2016.12.2
Rh(III)-catalyzed synthesis of mesoionic heterocycles has been achieved via C–H activation of sydnones and oxidative coupling with internal alkynes. This reaction occurred under mild conditions with high efficiency, broad substrate scope, and low catalyst loading. Moreover, synthetic applications of a coupled product have been demonstrated in the late-stage derivatization into a variety of highly functionalized
Direct Carboxamidation of Sydnones with Chlorosulfonyl Isocyanate
作者:Kenneth Turnbull、Kevin C. Gross、Tyler A. Hall
DOI:10.1080/00032719808006493
日期:1998.3.1
Abstract Various 4-carboxamido sydnones 2 can be prepared in good yield by reaction of the corresponding 3-substituted sydnones (cf. 1) with chlorosulfonylisocyanate at room temperature.
Chlorination of 3-Arylsydnones with Iodine Monochloride
作者:Imad F. Nashashibi、Jonathan M. Tumey、Benjamin L. Owens、Kenneth Turnbull
DOI:10.1080/00304948.2017.1260398
日期:2017.1.2
Sydnones undergo electrophilic aromatic substitution at the 4-position1,2 and bromi-nation has been the most studied reaction of this type. For the latter, a number of methods, including Br2 / NaH...