Sm. Ruder et Vr. Kulkarni, MICHAEL-TYPE ADDITIONS OF 2-(DIETHOXYPHOSPHINYL) CYCLOHEXANONE TO ACTIVATED ALKENES AND ALKYNES, Journal of the Chemical Society, Chemical Communications, (18), 1994, pp. 2119-2120
Michael reaction of phosphonate stabilized anions with, activated alke
nes and alkynes results in 1,4-addition, diastereoselective Robinson a
nnulation, or (n + 2) ring enlargement reactions.