Abstract
| - γ-Phosphono-α-aminobisphosphonates were synthesized from a new class of 4-phosphono-1-aza-1,3-dienes by the addition of dialkyl trimethylsilyl phosphites to these azadienes in the presence of acid.Depending on the steric demand of the group on nitrogen, double 1,2-addition or tandem 1,4−1,2-additionoccurred.
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