An improved synthesis of anticancer benzothiopyranoindazoles. An efficient large-scale β-aminoethylation procedure
作者:Vladimir G. Beylin、Norman L. Colbry、Anne B. Giordani、Om P. Goel、Donald R. Johnson、Robert L. Leeds、Boguslawa Leja、Edward P. Lewis、David M. Lustgarten、H. D. Hollis Showalter、Anthony D. Sercel、Michael D. Reily、Susan E. Uhlendorf、Katherine A. Zisek、Peter Mcdonnell
DOI:10.1002/jhet.5570280261
日期:1991.2
Improved processes for the synthesis of bulk quantities of the benzothiopyranoindazole clinical agent CI-958 and A-ring congeners is reported. The process chosen for scale-up operations achieves β-aminoethylation of an anilino precursor via a three-step sequence (acylation, reduction, deprotection) starting from N-(trityl)glycine. Detailed analytical data are reported for the target compounds and most