... Calcd for C23H26N2O6: C, 64.78; H, 6.14; N 6.57. Found: C, 64.41; H, 6.28; N, 6.81. o:-(tert-Butyloxycarbonylamino)-N',N'-(methyl,fluorenylmethyloxycarbonyl)glycine (6c). Using the same procedure as that used for 6a, a mixture of 4b ...
... Calcd for C24H23N2O6: C, 65.41; H, 6.41; N 6.36. Found: C, 65.17; H, 6.59; N, 6.71. Acknowledgments This work was supported by NIH grants DK 26741, HD 13527, HL 41910 and the Hearst Foundation. We acknowledge the outstanding technical ...