Fatty acids containing photoactivable carbene precursors. Synthesis and photochemical properties of 3,3-bis(1,1-difluorohexyl)diazirine and 3-(1,1-difluorooctyl)-3H-diazirine
Fatty acids containing photoactivable carbene precursors. Synthesis and photochemical properties of 3,3-bis(1,1-difluorohexyl)diazirine and 3-(1,1-difluorooctyl)-3H-diazirine
Rare earth-Li-BINOL complexes were used to catalyze nitroaldolreactions of α,α-difluoro adehydes with nitromethane in a good enantioselective manner. The optical yields of nitroaldol 2a depend on the size of rare earth metals, and an Sm-Li-BINOL complex gave the highest enantioselectivity. The enantiotopic face selection of α,α-difluoro aldehyde 1a was found to be different from that of nonfluorinated