Tetrakis(trimethylsilyl) Ethenylidene-1,1-bisphosphonate: A Mild and Convenient Michael Acceptor for the Synthesis of 2-Aminoethylidene-1,1-bisphosphonic Acids and Their Potassium Salts
Tetrakis(trimethylsilyl) Ethenylidenebisphosphonate: A Mild and Useful Reagent for the Synthesis of Substituted 2-Aminoethylidene-1,1-bisphosphonic Acids
作者:Michael V. Shevchuk、Vadim D. Romanenko、Valery P. Kukhar
DOI:10.1080/10426507.2010.500640
日期:2011.3.31
Tetrakis( trimethylsilyl) ethenylidenebisphosphonate is proposed as a substrate in the preparations of N-substituted 2-aminoethylidene-1,1-bisphosphonic acids. The method provides an extremely mild protocol for the synthesis of these compounds and is compatible with a wide range of functional groups.
Tetrakis(trimethylsilyl) Ethenylidene-1,1-bisphosphonate: A Mild and Convenient Michael Acceptor for the Synthesis of 2-Aminoethylidene-1,1-bisphosphonic Acids and Their Potassium Salts
A straightforward synthesis of highly functionalized 2-aminoethylidene-1,1-bisphosphonic acids via the Michael addition of amines to easily available tetrakis(trimethylsilyl) ethenylidene-1,1-bisphosphonate, H2C=C[P(O)(OTMS)2]2, has been described. The potassium salts of the title compounds were also easily achieved in high yield by reacting the Michael adducts with potassium fluoride.