The preparation of a 10-membered ring macrolactone by selective ozonolysis and the role of the dihydropyran-substituent on the MCPBA-oxidation reaction profile of beta-lapachone phenazines

Autor: Raphael S. F. Silva, Janaína G. Soares, Alessandra G. Cioletti, Marília O. F. Goulart, Tiago T. Guimarães, Carlos A. de Simone, Antonio V. Pinto, Daniel V. Teixeira, Maria do Carmo F. R. Pinto, Ana Paula G. Lobato
Jazyk: angličtina
Rok vydání: 2005
Předmět:
Zdroj: Journal of the Brazilian Chemical Society, Volume: 16, Issue: 5, Pages: 1074-1077, Published: OCT 2005
Popis: The benzophenazine from beta-lapachone was submitted to ozonolysis under conditions that selectively furnished the corresponding rigid macrocyclic lactone 7,7-dimethyl-7,8,9,10-tetrahydro-5H-benzo[3,4]oxecino[5,6-b]quinoxaline-5,10-dione in an yield of 52%. The effect of substituents located at the dihydropyrane moiety of the phenazines, namely C2'-OH, C2'-Br and C2'-I, in the oxidation with MCPBA, was also investigated. A benzofenazina derivada da beta-lapachona foi submetida a ozonólise em condições que forneceram seletivamente a lactona macrocíclica 7,7-dimetil-7,8,9,10-tetrahidro-5H-benzo[3,4]oxecino[5,6 -b]quinoxalina-5,10-diona, com rendimento de 52%. O efeito de substituintes localizados no anel diidropirânico das fenazinas, no caso C2' -OH, C2' -Br e C2' -I, em reações de oxidação com MCPBA, foi também investigado.
Databáze: OpenAIRE