33202-91-4Relevant academic research and scientific papers
Cu(OAc)2-mediated reaction of C60 with ureas for the preparation of fulleroimidazolidinones
Yang, Hai-Tao,Tan, Yi-Chen,Yang, Yang,Sun, Xiao-Qiang,Miao, Chun-Bao
, p. 1157 - 1163 (2016/02/18)
The Cu(OAc)2-mediated intermolecular diamination reaction of C60 with ureas allows the concise and efficient preparation of fulleroimidazolidinones involving the cleavage of two N-H bonds and formation of two C-N bonds. Both dialkylated and diarylated fulleroimidazolidinones can be synthesized using this method.
The Schmidt reaction of dialkyl acylphosphonates
Sprecher, Milon,Kost, Daniel
, p. 1016 - 1026 (2007/10/02)
The scope of the Schmidt rearrangement of ketones has been extended to dialkyl acylphosphonates (11a-11l). Surprisingly, it was found that 11a-11d and 11g, in which the acyl moiety was benzoyl alone or benzoyl bearing an electron-attracting or mildly electron-releasing substituent, yielded an overwhelming portion of products resulting from C-to-N migration of the aryl group (N-arylcarbamoylphosphonates, 12, and N-arylformamides, 15). Contrariwise, the arenecarbonylphosphonates, which carry a powerful electron-releasing p-alkoxy group, yielded products resulting from phosphonate group migration from C to N or elimination (dialkyl N-arenecarbonylphosphoramidates, 13, and arenecarbonitriles, 17, respectively). These counterintuitive results are rationalized by application of the concept of "degree of electron demand" to this area of intramolecular rearrangements. The possible existence of an additional pathway for the Schmidt rearrangement, involving protonation of the iminodiazonium ion, is proposed.
Organic Phoshorus Compounds. XVI. On the Chemistry of the Isocyanatophosphoric Acid Diethyl Ester
Moll, Rainer,Jentzsch, Renate,Fischer, Gerhard W.
, p. 439 - 443 (2007/10/02)
A one-pot procedure for preparing ureidophosphoric acid dialkyl esters 2 from POCl3, urea, and alcohols via ureidophosphoric acid dichloride 1 was worked out. 2 (R=Et) was used as starting material for isocyanatophosphoric acid diethyl ester (4, R=Et), th
