Synthesis and antitumor activity of structural analogs of the epipodophyllotoxins
作者:Larry L. Klein、Clinton M. Yeung、Daniel T. Chu、Edith J. McDonald、Jacob J. Clement、Jacob J. Plattner
DOI:10.1021/jm00107a016
日期:1991.3
Several ring-contracted analogues of the antitumor agent etoposide have been prepared. The synthesis of the simple indanyl system 3 is described along with two bicyclic systems of general structure 4 prepared through a stereoselective allylation of the keto-ester 6. A cis-fused lactone analogue 5, which is isomeric with the etoposide aglycone, has been synthesized via a dialkylation of the indene-2-carboxylate