Sk. Ahn et al., Practical synthesis of (S)-7-(2-isopropylamino)ethylcamptothecin hydrochloride, potent topoisomerase I inhibitor, J HETERO CH, 37(5), 2000, pp. 1141-1144
A practical semi-synthetic method of (S)-7-(2-isopropylamino)ethylcamptothe
cin hydrochloride has been developed. The Mannich reaction of (S)-7-methylc
amptothecin with isopropylamine hydrochloride in dimethyl sulfoxide as a fo
rmaldehyde source gave the desired product in moderate yield.