1: methyl (triphenylphosphoranylidene)acetate in dichloromethane
T=20°C; 1 h;
2: benzaldehyde With triethylamine in dichloromethane
T=-78 - 20°C; Further stages.;
Ainsworth, Peter J.; Craig, Donald; Reader, John C.; Slawin, Alexandra M. Z.; White, Andrew J. P.; Williams, Dawid J.
Tetrahedron, 1995 , vol. 51, # 42 p. 11601 - 11622