Highly efficient and eco-friendly protocol for the synthesis of bis(3-indolyl)methanes by the electrophilic substitution reaction of indole with aldehydes catalyzed by poly(4-vinylpyridinium)hydrogen sulfate was described. Excellent yields, shorter reaction times, simple work-up procedure, avoiding hazardous organic solvents, and reusability of the catalyst are the most obvious advantages of th...

Efficient synthesis of bis(indolyl)methanes by the reaction of indole with certain aldehydes and ketones in water afforded the corresponding bis(indolyl)methanes in excellent yields. This reaction has been carried out in the presence of 2 mol% of cerium(IV)triflate at room temperature.

Sulfate is an essential macroelement for all living organisms. However, sulfate can be limited in agricultural settings. Microorganisms change their gene expression to acclimate deficient conditions. Green microalga Chlamydomonas reinhardtii expresses and secretes extracellular arylsulfatase (ARS) under Our results show that C. ARS hydrolyze both monoester (5-bromo-4-chloro-3 indolyl sulfate; X...