Electrochemical corrosion behaviour of four low-carbon steels in saline soil

Abstract

The corrosion behaviour and corrosion products of four kinds of low carbon steels in natural saline soil were studied by various testing methods and surface characterization methods.

Iron(iii)-catalyzed tandem annulation of indolyl-substituted p-quinone methides with ynamides for the synthesis of cyclopenta[b]indoles

“…3 Among those explorations, o -aminophenyl and o -hydroxyphenyl-substituted p -QMs I (X = OH, NHR) bearing an exocyclic nucleophilic motif at the C8 position have been generally used as a four-atom synthon in the development of (4+ n ) annulations (Scheme 1a). 3 b – e ,4 Besides, typical aryl-substituted p -QMs I (X = H, R) directly acting as a C2 synthon have been disclosed in a series of type I (2+ n ) annulations occurring at C5 and C6 (Scheme 1a). 5 However, there is no report on exploring p -QMs as a positional isomeric C2 synthon in alternative (2+ n ) annulations.…”