activity and the mechanism of di-iron catalysts for aziridination of styrenes using phenyltosyliodinane (PhINTs). In addition, we have developed a similar mono-iron catalyst which operates under the same mechanism albeit with a reduced activity. DFT calculations were performed to investigate the structure and electronic structure of the FeIVNTs species of the latter catalyst. They suggest that the reaction
Enabling Catalytic Arene C–H Amidomethylation via Bis(tosylamido)methane as a Sustainable Formaldimine Releaser
作者:Zhong-Yuan Li、Hetti Handi Chaminda Lakmal、Xin Cui
DOI:10.1021/acs.orglett.9b01183
日期:2019.5.17
Addition of catalytic arene C–H to formaldimines has been enabled by Ru(II)-catalyzed amidomethylation with bis(tosylamido)methane as a catalytic formaldimine releaser. The new process provides an atom-efficient and sustainable solution to address the challenges of formaldimines in this type of transformation. Furthermore, new synthetic routes based on this catalytic system have been developed for
2-oxazetidines with carboxylic aciddirected C–H activation in catalytic synthesis of isoindolinones is reported for the first time. This reaction opens a new and sustainable avenue to prepare a range of structurally diverse isoindolinone skeletons from readily available benzoicacids. The success of late-stage functionalization of some bioactive acids, and concise synthesis of biologically important skeletons
isoindolinones via the direct coupling of N -methoxybenzamides and bis(tosylamido)methane with rhodium(III) as catalyst has been developed. The reaction is performed under mild conditions, without oxidant, and is compatible with various functional groups. Compared with the previously reported method for constructing isoindolinone skeletons, this method involves a novel [3+2] cyclization, and affords a wide
Catalytic Amidomethylative [2+2+2] Cycloaddition of Formaldimine and Styrenes toward N-Heterocycles
作者:Hetti Handi Chaminda Lakmal、Jacob Istre、Xue Xu、Xin Cui、Xiaolin Qian、Hui Zhou、Henry U. Valle
DOI:10.1055/a-1710-7256
日期:2022.5
Chemo-switchable catalytic [2+2+2] cycloaddition of alkenes with formaldimines is reported. Bis(tosylamido)methane (BTM) and 1,2-ditosyl-1,2-diazetidine (DTD), two bench-stable precursors for highly reactive tosylformaldimine, have been identified to be effective. BTM worked as a selective releaser of the formaldimine for catalytic [2+2+2] reactions toward hexahydropyrimidine products via a presumable