Asymmetric catalysis represents a very powerful tool for the synthesis of enantiopure compounds. In this context the main focus has been directed not only to the search for new efficient chiral catalysts, but also to the development of efficient pronucleophiles. This review highlights the utility and first examples of 1H-imidazol-4(5H)-ones and thiazol-4(5H)-ones as pronucleophiles in catalytic...

On the basis of Hebrew manuscripts and other ancient textual witnesses, this article singles out discusses many text-critical translational issues regarding Psalm 17, dwelling particularly upon vv.11 14. For v.11, author accepts conjectural reading אִשְּׁרוּנִי עתַָּה סְבָבוּנִ י , “they have advanced/moved against me, now, they encircled me”. v.14, gives preference to qere וּצְפוּנְךָ with collective meaning: “...

brønsted acidic ionic liquid triethylamine-bonded sulfonic acid {[et3n-so3h]cl} efficiently catalyzes the one-pot multi-component condensation of 2-naphthol with arylaldehydes and dimedone (5,5-dimethylcyclohexane-1,3-dione) under solvent-free conditions to afford 12-aryl-8,9,10,12-tetrahydrobenzo[a]xanthen-11-ones in high yields and relatively short reaction times.

We classify pairs (X,G) consisting of a complex K3 surface X and finite group G≤Aut(X) such that the subgroup G s ⪇G symplectic automorphisms is among 11 maximal ones as classified by Mukai.