Jy. Lai et al., PALLADIUM(II)-CATALYZED SYNTHESIS OF OPTICALLY-ACTIVE TETRAHYDRO-1,4-OXAZINE DERIVATIVES, Journal of organic chemistry, 58(18), 1993, pp. 4775-4777
Three different types of morpholine derivatives 1-3 could be obtained
from allylic amine substrates 4 in high yield and excellent diastereos
electivity by slight, variation of the Pd(II)-Cu(II) reagents system.