Synthesis of optically active boroxazolidine, borathiazolidine and boraselenazolidine and their N-borane adducts from the corresponding 2- imino-heteroazolidines

Article abstract of DOI:10.1016/S0957-4166(97)00591-0

The synthesis from the corresponding 2-imino-heteroazolidines of optically active boroxazolidine, borathiazolidine and boraselenazolidine, derived from ephedrine, and their N-borane adducts is reported. The X-ray diffraction structures of (4R,5R)-(+)-3,4-