Petroleum product pipelines in India contain large numbers of various types of microorganisms that either directly or indirectly enhance corrosion. Field studies have been carried out by CSIR-CECRI to investigate the corrosion problem in petroleum product transporting pipelines in South India. Although Unicor J inhibitor was added in the pipeline to control corrosion, corrosion products were detected in the pipeline. The present study reveals that the degradation of the inhibitor enhances the proliferation of bacteria, which enhances the corrosion. The selection of an inhibitor to control corrosion has also been done.

A series of iminoindoline-derived alkenes was found to be a new class of excellent aza-diene electrophiles in NHC-catalyzed asymmetric [4 + 2] cyclizations. This transformation is mainly characterized by excellent compatibility, which allows aza-diene substrates to incorporate various substituents and functionalities, including (hetero)aryl, (linear or branched)alkyl, alkenyl, alkynyl, and ester groups. Forty examples of the desired tetrahydro-α-carbolinones were facilely synthesized using this method, with up to 99% yield and >99% ee. Letter pubs.acs.org/OrgLett

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