Amidine-Based Catalysts (ABCs)- Design Development and Applications) Ma, J. C.; Dougherty, D. A. Chem. Rev. 1997, 97, 1303. (b) Hunter, C. A.;
Lawson, K. R.; Perkins, J.; Urch, C. J. J. Chem. Soc., Perkin Trans. 2 2001,
651. (c) Wei, Y.; Held, I.; Zipse