hydrogen; RuH(.eta.1-BH4)[(S)-2,2'-bis(di-3,5-xylylphosphino)-1,1'-binaphthyl][(S,S)-1,2-diphenylethylenediamine] in isopropyl alcohol T=23 - 25°C; P=6080.41 Torr; 15 h;

(3aS)-1-methyl-3, 3-diphenyl-tetrahydro-pyrrolo[1,2-c][1,3,2]oxazaborole borane complex in dichloromethane T=-20°C; Yield given. Yields of byproduct given. Title compound not separated from byproducts;