The total sytheses of the marine bisindole alkaloids, hamacanthins were achieved by a novel transamidation-cyclization of N-(2-aminoethyl)-2-oxoethanamides to 3,5- and 3,6-disubstituted piperazinones. (C) 2003 Elsevier Ltd. All rights reserved.
First Total Synthesis of Dragmacidin A via Indolylglycines
The first totalsynthesis of dragmacidin A has been accomplished using condensation of two indolylglycines followed by cyclization and reduction. The general and practical method for synthesis of indolylglycines via Wittig reaction, azide addition, and reduction from indolin-3-ones is also described.