Reaction of benzolactams with triethyl phosphite prompted by phosphoryl chloride affords benzoannulated monophosphonates instead of expected bisphoshonates
gave cyclic aminomethylene-gem-bisphosphonates in reaction with triethyl phosphite and phosphoryl chloride, the corresponding benzoannulated lactams usually provide monophosphonates of variable structures, which depend on size of the substrate aliphatic ring. Most likely they are obtained by dephosphonylation of bisphosphonates, which form as initial products of this reaction. These phosphonate esters
Directing Group in Decarboxylative Cross-Coupling: Copper-Catalyzed Site-Selective C–N Bond Formation from Nonactivated Aliphatic Carboxylic Acids
作者:Zhao-Jing Liu、Xi Lu、Guan Wang、Lei Li、Wei-Tao Jiang、Yu-Dong Wang、Bin Xiao、Yao Fu
DOI:10.1021/jacs.6b05788
日期:2016.8.3
Copper-catalyzed directed decarboxylative amination of nonactivated aliphatic carboxylic acids is described. This intramolecular C-N bond formation reaction provides efficient access to the synthesis of pyrrolidine and piperidine derivatives as well as the modification of complex natural products. Moreover, this reaction presents excellent site-selectivity in the C-N bond formation step through the
An Interrupted Schmidt Reaction: C–C Bond Formation Arising from Nitrilium Ion Capture
作者:Manwika Charaschanya、Kelin Li、Hashim F. Motiwala、Jeffrey Aubé
DOI:10.1021/acs.orglett.8b02531
日期:2018.10.19
The rerouting of the nitrilium ion formed in the Schmidt reaction of ketones and TMSN3 to encompass C–C bond formation with an electron-rich aromatic group is reported. Thus, when the reaction is carried out in HFIP using AlCl3 or AlBr3 as the promoter, imines, iminium ions, or enamide derivatives are obtained through one-pot procedures. The scope and possible mechanisms of these new transformations