Gm. Dubowchik et Ra. Firestone, THE SYNTHESIS OF BRANCHED STEROIDAL PRODRUGS OF NITROGEN-MUSTARD FOR ANTITUMOR TARGETING VIA RECONSTITUTED LDL, Tetrahedron letters, 35(26), 1994, pp. 4523-4526
Bis and tris nitrogen mustard oleoyl-steroid carbamates were synthesiz
ed from commercially available cholenic acids for antitumor drug targe
ting via the LDL pathway. The tris-mustards were prepared through trie
ster intermediates made from selective alkylation of the dianion of t-
butyl 3-(diethyl malonyl)propionate 10 with steroid iodides 8.