... Tetrahedron Letters. Volume 29, Issue 2, 1988, Pages 235–238. ... CNCH(R)COOMe: R = H, Me, Et, -Pr, Ph) with paraformaldehyde in the presence of 1 mol% of a chiral (aminoalkyl) ferrocenylphosphine-gold(I) complex gave optically active 4-alkyl-2-oxazoline-4-carboxylates ( ...