(22) K, and k, values for benzylamine, an excellent substrate for MA0 B, were determined under these conditions to be 0.18 mM and 162 mid , respectively. (23) Zelechonok, Y.; Silverman, RB J. Org. Chem., in press. (24) Burkey, T. J.; Castelhano, A. L.; Griller, D.; Loesig, FP J. Am. Chem. Soc. 1985, 105,4701-4703. (25) Laurie, D.; Lucaa, E.; Nonhebel, DC; Suckling, CJ; Walton, JC Tetrahedron 1986, 42, 1035-1045. ... 1.90-2.10 (m, 1 H), 2.80-3.05 (m, 3 H), ...