Direct Preparation of Rotaxane from Aminoalcohol: Selective<i>O</i>-Acylation of Aminoalcohol in the Presence of Trifluoromethanesulfonic Acid and Crown Ether
Selective O-acylation of aminoalcohols by a bulky acid anhydride in the presence of trifluoromethanesulfonic acid and dibenzo-24-crown-8 afforded [2]rotaxane in high yields. An acid halide could be used as an acylating reagent in the presence of silver trifluoromethanesulfonate.
N-Substituent Effects in the Selective Delivery of Polyamine Conjugates into Cells Containing Active Polyamine Transporters
作者:Richard Andrew Gardner、Jean-Guy Delcros、Fanta Konate、Fred Breitbeil、Bénédicte Martin、Michael Sigman、Min Huang、Phanstiel
DOI:10.1021/jm0497040
日期:2004.11.1
N(1)-anthracen-9-ylmethyl, N(1)-2-(anthracen-9-yl)ethyl, N(1)-3-(anthracen-9-yl)propyl, and pyren-1-ylmethyl. The polyamine architecture was also altered and ranged from diamine to triamine and tetraamine systems. Biological activities in L1210 (murine leukemia), Chinese hamster ovary (CHO), and CHO's polyamine transport-deficient mutant (CHO-MG) cell lines were investigated via IC(50) cytotoxicity determinations