Synthesis of 1,2-diamines
Indium tribromide catalyzes efficiently the aminolysis of activated aziridines with aromatic amines under mild reaction conditions to afford the corresponding vicinal-diamines in high yields with high selectivity.
J. S. Yadav, B. V. S. Reddy, K. Vishweshwar Rao, K. Saritha Raj, A. R. Prasad, Synthesis, 2002, 1061-1064.
A cationic iron complex catalyzes the aminolysis of meso-N-aryl aziridines very efficiently and furnishes valuable 1,2-diamines in excellent yields. This protocol is compatible with a range of functional groups both in the aziridine and amine components.
A. Marti, L. Richter, C. Schneider, Synlett, 2011, 2513-2516.
The aminolysis of meso-N-phenyl aziridines is efficiently catalyzed by 1 mol% of Sc(OTf)3 and furnishes valuable 1,2-diamines in good to excellent yields.
S. Peruncheralathan, M. Henze, C. Schneider, Synlett, 2007, 2289-2291.
SN2-type ring-opening of activated aziridines with 2-bromoanilines followed by a Pd-catalyzed intramolecular C-N bond formation enable a highly regio- and stereoselective route for the synthesis of racemic and nonracemic tetrahydroquinoxalines.
M. K. Ghorai, A. K. Sahoo, S. Kumar, Org. Lett., 2011, 13, 5972-5975.
The use of CuCl as catalyst and di-tert-butylthiadiaziridine 1,1-dioxide as nitrogen source allows an effective diamination of activated terminal olefins in good yields under mild reaction conditions.
B. Zhao, W. Yuan, H. Du, Y. Shi, Org. Lett., 2007, 9, 4943-4945.
Cu(I)-catalyzed diamination of conjugated dienes with di-tert-butyldiaziridinone as nitrogen source proceeds at the internal double bond with high regio- and diasteroselectivity in good yield using inexpensive CuBr as catalyst.
B. Zhao, X. Peng, S. Cui, Y. Shi, J. Am. Chem. Soc., 2010, 132, 11009-11011.
The use of di-t-butyldiaziridinone as nitrogen source and a N-heterocyclic carbene-Pd(0) complex as catalyst allows an efficient diamination of a wide variety of conjugated dienes and trienes in good yields with high regio- and stereoselectivities.
L. Xu, H. Du, Y. Shi, J. Org. Chem., 2007, 72, 7038-7041.
A wide variety of terminal olefins can be effectively diaminated at allylic and homoallylic carbons via formal C-H activation in good yields with high stereoselectivity using di-tert-butyldiaziridinone as nitrogen source and Pd(PPh3)4 as catalyst.
H. Du, W. Yuan, B. Zhao, Y. Shi, J. Am. Chem. Soc., 2007, 129, 7496-7497.
A remarkable Pd-catalyzed diamination of unactivated alkenes using N-fluorobenzenesulfonimide (NFBS) as an aminating reagent is described. The reaction incorporates one nitrogen donor from the substrate and the other from the NFBS, thereby generating cyclic diamine derivatives in a single step. The products are differentially protected at both nitrogens, allowing for maximal synthetic flexibility.
P. A. Sibbald, F. E. Michael, Org. Lett., 2009, 11, 1147-1149.
A palladium-catalyzed intramolecular diamination reaction yields cyclic ureas as direct products of an oxidative alkene transformation in the presence of iodosobenzene diacetate as terminal oxidant.
J. Streuff, C. H. Hövelmann, M. Nieger, K. Muniz, J. Am. Chem. Soc., 2005, 127, 14586-14587.