Interrupted Plancher Rearrangement Initiated by Dearomative Epoxide-Indole Cyclization: Formal Umpolung Reactivity of Indoles.

We herein report the serendipitous discovery of the interrupted Plancher rearrangement initiated by an HFIP-promoted dearomative epoxide-indole cyclization, unlocking a new blueprint to the formal C3 umpolung reactivity of indoles. This rapid complexity generating cascade process paves the way toward a new class of fused-bridged indolines in high yields and under full regio- and diastereocontrol. The reaction is amenable to a wide range of substituents in the starting materials.

Combined application of earthworms and plant growth promoting rhizobacteria improve metal uptake, photosynthetic efficiency and modulate secondary metabolites levels under chromium metal toxicity in Brassica juncea L.

Chromium (Cr) toxicity impairs essential morphological and metabolic activities in plants. The present investigation was carried out to evaluate the beneficial role of plant growth promoting rhizobacterial strains namely Pseudomonas aeruginosa (M1), Burkholderia gladioli (M2) and earthworms (Eisenia fetida) in alleviating Cr toxicity in 10 days old Brassica juncea L. The findings delineated that addition of earthworms and PGPR restored growth, boosted Cr uptake and showed upregulation of metal transporter genes (SULTR 1-4).

Luteibacter sahnii sp. nov., A Novel Yellow-Colored Xanthomonadin Pigment Producing Probiotic Bacterium from Healthy Rice Seed Microbiome.

To explore the rice seed microbiome, our objective was to isolate novel strains of Xanthomonas, a plant-associated bacterium with diverse lifestyles. Four isolates, anticipated to be Xanthomonas based on morphological features of yellow colonies, were obtained from healthy rice seeds. Phylo-taxono-genomic analysis revealed that these isolates formed monophyletic lineages belonging to a novel species within the genus Luteibacter.

Constructing spirooxindoles from non-oxindole precursors: a one-pot nitro-reduction/double lactamization approach to spiro[indoline-3,3'-quinoline]-2,2'-diones.

2-(2-Nitrobenzyl)-2-(2-nitrophenyl)malonates, readily prepared by SAr-arylation of diethyl malonate with -fluoronitrobenzenes, followed by S2-alkylatioin of the resulting products with -nitrobenzyl bromides, undergo a tandem Fe/AcOH-promoted nitro-reduction and double lactamization sequence to afford spiro[indoline-3,3'-quinoline]-2,2'-diones in high overall yields. The method is operationally simple, economical, and has a broad substrate scope. The synthetic practicality of this methodology was illustrated by performing the reaction on a gram scale with the same efficiency.