By Sherman H. C.
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Additional info for An Investigation of the Chemical Nature of Two Typical Enzymes Pancreatic and Malt Amylases
I. Ugi, Rec. Chem. , 30, 289 (1969); A. Demharter, I. Ugi, J. Prakt. , 335, 244 (1993). 65. H. Kunz, W. Pfrengle, J. Am. Chem. , 110, 651 (1988); Tetrahedron, 44, 5487 (1988). 66. M. Goebel, I. , 36, 6043 (1995); M. -G. Nothofer, G. Ross, I. Ugi, Tetrahedron, 53, 3123 (1997). 67. S. Lehnhoff, M. Goebel, R. M. Karl, R. Klo¨sel, I. Ugi, Angew. , 107, 1208 (1995); Angew. Chem. Int. Ed. , 34, 1104, (1995). 68. A. V. Zychlinski, in MultiComponent Reactions & Combinatorial Chemistry, Z. Hippe, I. , pp.
W. J. Chang, P. J. Scheuer, Top. Curr. , 167, 33 (1993). 31. I. Ugi, R. Meyr, Angew. , 70, 702 (1958); I. Ugi, R. Meyr, Chem. , 93, 239 (1960); I. Ugi, U. Fetzer, U. Eholzer, H. Knupfer, K. Offermann, Angew. , 77, 492 (1965); Angew. Chem. Int. Ed. , 4, 452 (1965). 32. H. Eckert, B. Forster, Angew. , 99, 922 (1987); Angew. Chem. Int. Ed. , 26, 1221 (1987). 33. G. Skorna, I. Ugi, Angew. , 89, 267 (1977); Angew. Chem. Int. Ed. , 16, 259 (1977). 34. R. Obrecht, R. Herrmann, I. Ugi, Synthesis, 400 (1985).
Lehnhoff and Ugi67 used the U-4CR with 1amino-2-deoxy-2-N-acetylamino-3,4,6-tri-O-acetyl-b-D -glucopyranose, 59, whose large variety of products could be formed stereoselectively in excellent yields. The desired selective cleavage of the auxiliary groups of these products was equally unefﬁcient. Zychlinski68 prepared 1-amino-5-deoxy-5-acetamido-2,3,4-tri-O-acetyl-b-D glucopyranose 60 by a synthesis of 11 steps. This amine component undergoes the U-4CRs very well and the products are cleavable by water, but unfortunately they are not very stable.
An Investigation of the Chemical Nature of Two Typical Enzymes Pancreatic and Malt Amylases by Sherman H. C.