SciELO - Scientific Electronic Library Online

 
vol.46 número3CONFORMATIONAL DYNAMICS OF SUBSTITUTED N-ACETYL-N-PHENYLBENZYLAMINES. 1H-DNMR AND AM1-MO STUDYOPTIMIZACION DE UNA TECNICA DE MUESTREO IN SITU: ANÁLISIS DE Cu Y Fe EN SISTEMAS ACUÁTICOS índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Boletín de la Sociedad Chilena de Química

versão impressa ISSN 0366-1644

Resumo

KESTERNICH, VICTOR; CONTRERAS-ORTEGA, CARLOS  e  MARTINEZ, ROLANDO. A THEORETICAL STUDY OF THE STEREOCHEMICAL COURSE OF THE ACID CYCLIZATION OF TWO 5-OXOGERMACREN- 6,12-OLIDES EPIMERIC IN C4. Bol. Soc. Chil. Quím. [online]. 2001, vol.46, n.3, pp.271-279. ISSN 0366-1644.  http://dx.doi.org/10.4067/S0366-16442001000300006.

The theoretical study of both the conformational distribution and the acid cyclization of two epimeric 5-oxogermacren-6,12-olides in C4 is described. Our results on the stereochemistry of the cyclization products, 5-hydroxyguaian-6,12-olides, agree with experimental results reported previously. Curtin-Hammet principle and Hammond postulate are used to propose reaction pathways consistent with above results. The theoretical results were obtained by using a MM2 program from HyperChem 4.5

Palavras-chave : Sesquiterpenic lactones; germacranolides; guaianolides; MM2 program.

        · resumo em Espanhol     · texto em Inglês

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons