Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Science China: Chemistry called Carbene-catalyzed activation of cyclopropylcarbaldehydes for Mannich reaction and δ-lactam formation: remote enantioselectivity control and dynamic kinetic asymmetric transformation, Author is Lv, Jie; Xu, Jun; Pan, Xuling; Jin, Zhichao; Chi, Yonggui Robin, which mentions a compound: 1214711-48-4, SMILESS is ClC1=C(N2N=C3[N+]([C@@]4([H])[C@@](CC5=C4C=CC=C5)([H])OC3)=C2)C(Cl)=CC(Cl)=C1.F[B-](F)(F)F, Molecular C18H13BCl3F4N3O, Computed Properties of C18H13BCl3F4N3O.
An N-heterocyclic carbene (NHC)-catalyzed enantioselective Mannich reaction of the remote γ-carbon of cyclopropylcarbaldehydes was disclosed for the first time to yield δ-lactam compounds such as I [R = C6H5, 2-FC6H4, 2-thienyl, etc.; R1 = Me, Et, 4-O2NBn, R2 = H, Cl, Me, etc.]. Diastereo- and enantiomerically enriched multicyclic δ-lactam compound was afforded as the main product from 8 possible stereo-specific isomers through dynamic kinetic asym. transformation (DYKAT) processes. Multiple chiral functional mols. could be afforded from the lactam products through simple protocols with retentions of the optical purities.
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