Hollow and microporous organocatalytic polymers bearing pyrrolidines (H-MOP-P) were prepared by template synthesis and post-synthetic modification and showed enhanced performance, compared to nonhollow ones.
Pd(II) nanosalts
formed from [LnPd(OAc)2] (Ln = 1,3-bis(di-o-methoxyphenylphosphino)propane) and ammonium tethered
carboxylic acids in MeOH were utilized for the synthesis of antifouling
polyketones from CO and olefin; this is the first instance of the
synthesis of antifouling polyketones in the absence of additional
heterogeneous seeds. The polymerization of CO and olefin achieved
with the in situ-generated Pd(II) nanosalts was studied,
and the nanosalts were analyzed by dynamic light scattering (DLS)
experiments.
The capture and utilization of CO by 1,5,7‐triazabicyclo[4.4.0]dec‐5‐ene (TBD) were performed in the absence of transition‐metal complexes. The reaction of TBD with CO afforded TBD‐CO adducts, which were converted to formylated TBD (TBD‐CHO). TBD‐CO adducts may include an interaction of CO with positively charged species based on NMR and IR analysis. In the presence of amines, CO was transferred from TBD‐CO to amines, producing formylated amines with good yields. The reaction mechanism involving TBD‐CO adducts is presented based on theoretical calculations.
α‐Sulfenylation of aldehydes and ketones using N‐formyl and N‐acyl sulfenamides, prepared by Cu‐catalyzed aerobic coupling of amides and thiols, was achieved in the presence of cyclic secondary amine⋅HCl catalysts. To obtain various sulfur‐functionalized carbonyl compounds, sulfenamides containing aromatic and aliphatic organosulfur were investigated. As carbonyl compounds, cyclic and acyclic ketones, 1,3‐dicarbonyl compounds, and aldehydes were investigated, affording the desired α‐sulfenylation products in good yields.
The front cover picture, provided by Jang and co‐workers, illustrates metal‐free carbon monoxide (CO) capture by the organic base, 1,5,7‐triazabicyclo[4.4.0]dec‐5‐ene (TBD). The authors report that a simple organic base (TBD) dimer captures CO by a non‐covalent interaction and that the resulting TBD‐CO adducts were employed for transferring CO to amines, forming formylated amines with high yields. Details of this paper can be found in the communication on pages 3068–3073 (H.‐W. Noh, Y. An, S. Lee, J. Jung, S. U. Son, H.‐Y. Jang, Adv. Synth. Catal. 2019, 361, 3068–3073; DOI: 10.1002/adsc.201900185).
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