new method for the synthesis of quaternary α-alkenyl substituted aminoacids by the enantio- and diastereoselectiveaddition of imidazolidinone derivatives to alkynes and allenes. Further hydrolysis of the imidazolidinone products under acidic conditions afforded biologically relevant aminoacidderivatives. This method is geometry-selective (E-isomer), enantio- and diastereoselective, and products were
Total synthesis of newbouldine via reductive N–N bond formation
作者:Michael Pangerl、Chambers C. Hughes、Dirk Trauner
DOI:10.1016/j.tet.2010.05.085
日期:2010.8
The first total synthesis of newbouldine has been achieved employing a new, reductiveN–Nbond forming reaction. The asymmetric synthesis confirms that the natural product is a racemate.