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   https://doi.org/10.1039/d1sc00158b  

   Zheng, Haifeng; Wang, Rui; Wang, Kan; Wherritt, Daniel; Arman, Hadi; Doyle, Michael P. (April 2021, Chemical Science)

   null (Ed.)

   Brønsted acid catalyzed formal [4 + 4]-, [4 + 3]-, and [4 + 2]-cycloadditions of donor–acceptor cyclobutenes, cyclopropenes, and siloxyalkynes with benzopyrylium ions are reported. [4 + 2]-cyclization/deMayo-type ring-extension cascade processes produce highly functionalized benzocyclooctatrienes, benzocycloheptatrienes, and 2-naphthols in good to excellent yields and selectivities. Moreover, the optical purity of reactant donor–acceptor cyclobutenes is fully retained during the cascade. The 1,3-dicarbonyl product framework of the reaction products provides opportunities for salen-type ligand syntheses and the construction of fused pyrazoles and isoxazoles that reveal a novel rotamer-diastereoisomerism. 

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2. Holography for $$ \mathcal{N} $$ = 4 on $$ \mathbbm{RP} $$4

   https://doi.org/10.1007/JHEP02(2023)106  

   Caetano, João; Rastelli, Leonardo (February 2023, Journal of High Energy Physics)

   A bstract We propose a holographic description of $$ \mathcal{N} $$ N = 4 super Yang-Mills on the four-dimensional real projective space $$ \mathbbm{RP} $$ RP 4 . We first construct the dual background in the framework of five-dimensional $$ \mathcal{N} $$ N = 8 gauged supergravity, and then uplift it to a new one-half BPS solution of type IIB supergravity. A salient feature of our solution is the presence of a bulk naked singularity whose local behavior resembles that of an O1 − plane in flat space. 

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3. Discovery of n-Type Zintl Phases RbAlSb ₄ , RbGaSb ₄ , CsAlSb ₄ , and CsGaSb ₄

   https://doi.org/10.1021/acsaem.0c00048  

   Ortiz, Brenden R.; Gorai, Prashun; Braden, Tara; Bensen, Erik A.; Wilson, Stephen D.; Stevanović, Vladan; Toberer, Eric S. (March 2020, ACS Applied Energy Materials)
4. Crystal structure of 4-methyl- N -(4-methylbenzyl)benzenesulfonamide

   https://doi.org/10.1107/S2056989020000535  

   Stenfors, Brock A.; Staples, Richard J.; Biros, Shannon M.; Ngassa, Felix N. (February 2020, Acta Crystallographica Section E Crystallographic Communications)

   null (Ed.)

   The title compound, C 15 H 17 NO 2 S, was synthesized via a substitution reaction between 4-methylbenzylamine and p -toluenesulfonyl chloride. In the crystal, N—H...O hydrogen bonds link the molecules, forming ribbons running along the b -axis direction. One of the aromatic rings hosts two intermolecular C—H...π interactions that link these hydrogen-bonded ribbons into a three-dimensional network. 

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   https://doi.org/10.1109/ECCE.2018.8558248  

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