Sample records for thiophenes
from WorldWideScience.org

Sample records 1 - 2 shown.



1

Componentes voláteis do café torrado. Parte I: compostos heterocíclicos/ Volatile components in roasted coffee. Part I: heterocyclic compounds

De Maria, Carlos Alberto Bastos; Moreira, Ricardo Felipe Alves; Trugo, Luiz Carlos
1999-04-01

Resumo em inglês A review of heterocyclic compounds in roasted coffee is presented. The contents, precursors and sensorial properties of furans, pyrroles, oxazoles, thiazoles, thiophenes, pyrazines and pyridines are discussed. The impact heterocyclic compounds of coffee aroma are described.

Scientific Electronic Library Online (Portuguese)

2

Aplicação de α-oxoceteno ditiocetais em síntese orgânica/ Reactivity of α-oxoketene dithiocetals in organic synthesis

Siqueira, Geonir M.; Neuenfeldt, Patrícia D.; Duarte, Anaí; Bretanha, Lizandra C.; Freitag, Rogério A.; Cunico, Wilson
2010-01-01

Resumo em inglês The synthesis and reactivity of α-oxoketenes dithioacetals (S,S-acetals), general structure [(R¹C=OC(R²)=C(SR³)(SR4)], are reported. We also showed the application of S,S acetals as synthons for efficient synthesis of isoxazoles, pyrazoles, indazoles, thiophenes, dithiol thiones, pyridines, pyrimidines and other heterocycles. This work aims to review the importance of α-oxoketenes dithioacetals in organic chemistry during the past few years.

Scientific Electronic Library Online (Portuguese)