623573-80-8Relevant articles and documents
A highly stereoselective approach to novel 2,2,4-trisubstituted pyrrolidines by halocylization: Key intermediates towards syntheses of nitrogen analogs of Noxafil
McCormick, Jinping L.,Osterman, Rebecca,Chan, Tze-Ming,Das, Pradip R.,Pramanik, Birendra N.,Ganguly, Ashit K.,Girijavallabhan, Viyyoor M.,McPhail, Andrew T.,Saksena, Anil K.
, p. 7997 - 8000 (2007/10/03)
A convenient synthesis of novel 2,2,4-trisubstituted pyrrolidines via stereoselective 5-exo iodocyclization of the 2,2-disubstituted olefins 8 and 9 is described. Single crystal X-ray analysis of the oxazolidinone 15 confirmed the relative stereochemistry in this cyclization. As observed earlier in the formation of 2,2,4-trisubstituted tetrahydrofurans, the presence of a bulky aryl substituent on the olefin appears to direct the stereochemical outcome of these halocyclizations.