Technical Note:

1. Phosphine -catalyzed intra-and intermolecular gamma-addition of nitrogen nucleophiles to allenoates and alkynoates.

2.Catalytic asymmetric construction of the tryptanthrin skeleton via enantioselective decarboxylativo 4+2 cyclization.

3.Catalytic, enantioselective carbon-oxygen bond formation - phosphine-catalyzed synthesis of benzylic esters via oxidation of benzylic C-H bonds.

4.Use of a new spirophosphine to achieve catalytic, enantios elective 4+ 1 annulations of amines with allenes to generatedihydropyrroles.

References: 1.Angew. Chem. Int. Ed.2013, 52, 2525. 2.Org. Lett.. 2017, 19, 3219 3.J. Am. Chem. Soc.. 2016, 138, 12069. 4.J. Am. Chem. Soc.. 2015, 137, 3803