De. Seitz et al., SYNTHESIS AND CHEMICAL-PROPERTIES OF A SERIES OF DOXORUBICIN ENAMINOMALONYL-BETA-ALANINE DERIVATIVES, Tetrahedron letters, 36(9), 1995, pp. 1413-1416
A series of doxorubicin enaminomalonyl-beta-alanine derivatives 1a-e h
as been synthesized as potential drug-linker domains of an antibody dr
ug conjugate. The release of doxorubicin from these enamide derivative
s under acidic and neutral conditions has been evaluated. Two activate
d esters, 6a and 6c, suitable for coupling to a monoclonal antibody ha
ve been prepared.