| abstract |
A compound of the formula (I) <EMI FILE = "97063643_1" ID = "1" MFI = JPEG> where each x is independently selected from the group consisting of = O, (H, H) = NRd y = S; n is 0 to 2; u is 0 to 2; 1 is 0 to 2; m is 1, and y is 1 to 3; or m is 2, and y is 0; each Rc is independently selected from the group consisting of H, C1-C6 alkyl, and - (Ch2) n1-R4, where n1 is 1 to 6, with the proviso that no more than one Rc is other than H in the portion <EMI FILE = "97063643_2" ID = "2" IMF = JPEG> Rd is independently selected from the group consisting of H, C1-C6 alkyl, -CN, -ORa, phenyl, substituted phenyl, benzyl, substituted benzyl , or allyl; R4 is -ORa, SRa, <EMI FILE = "97063643_3" ID = "3" IMF = JPEG> Rc´ is H, C1-C6 alkyl, or (CH2) nORa, with the condition that no more of an Rc 'is other than H: each Ra and Rb is independently selected from the group consisting of H, C1-C6 alkyl, phenyl, substituted phenyl, benzyl, substituted benzyl, and allyl; with the proviso that when R4 is <EMI FILE = "97063643_4" ID = "4" MFI = JPEG>, Ra is not H; or when Ra and Rb are attached to the same nitrogen, then Ra and Rb together with the nitrogen to which they are attached, they can form a ring of 4 to 7 members; ... |