53 research outputs found
Chelation-Assisted Rhodium-Catalyzed Direct Amidation with Amidobenziodoxolones: C(sp<sup>2</sup>)–H, C(sp<sup>3</sup>)–H, and Late-Stage Functionalizations
Air-stable
and convenient amidobenziodoxolones as an amidating
reagent were disclosed to enable direct amidation on a wide range
of C(sp<sup>2</sup>)–H bonds of (hetero)arenes and alkenes,
as well as unactivated C(sp<sup>3</sup>)–H bonds under Rh<sup>III</sup> catalysis. The approach to access 49 examples of structurally
diverse amides is featured by mild conditions, complete chemoselectivity
and regioselectivity, broad substrate scope (not limited to strongly
heterocyclic coordinating groups), and tolerance of valuable functional
substituents, such as unprotected amine and hydroxyl groups. The synthetic
applicability of this protocol is also demonstrated by late-stage
functionalization of biologically important scaffolds
Expedient Synthesis of Pyrroloquinolinones by Rh-Catalyzed Annulation of <i>N</i>‑Carbamoyl Indolines with Alkynes through a Directed C–H Functionalization/C–N Cleavage Sequence
A Rh-catalyzed redox-neutral C–H
functionalization of <i>N</i>-carbamoyl indolines with various
internal alkynes has
been developed. The reaction, which involves the sequential cleavage
of the C–H bond of the indoline at the C7-position and the
C–N bond of the urea motif, provides a divergent protocol to
rapidly assemble fused-ring pyrroloquinolinone analogues by
using a direct alkenylation/annulation strategy with high efficiency
and selectivity
Chelation-Assisted Rhodium-Catalyzed Direct Amidation with Amidobenziodoxolones: C(sp<sup>2</sup>)–H, C(sp<sup>3</sup>)–H, and Late-Stage Functionalizations
Air-stable
and convenient amidobenziodoxolones as an amidating
reagent were disclosed to enable direct amidation on a wide range
of C(sp<sup>2</sup>)–H bonds of (hetero)arenes and alkenes,
as well as unactivated C(sp<sup>3</sup>)–H bonds under Rh<sup>III</sup> catalysis. The approach to access 49 examples of structurally
diverse amides is featured by mild conditions, complete chemoselectivity
and regioselectivity, broad substrate scope (not limited to strongly
heterocyclic coordinating groups), and tolerance of valuable functional
substituents, such as unprotected amine and hydroxyl groups. The synthetic
applicability of this protocol is also demonstrated by late-stage
functionalization of biologically important scaffolds
Kinetic Resolution of 2,3-Dihydro-2-substituted 4-Quinolones by Palladium-Catalyzed Asymmetric Allylic Alkylation
Kinetic Resolution of 2,3-Dihydro-2-substituted 4-Quinolones by Palladium-Catalyzed Asymmetric Allylic Alkylatio
Kinetic Resolution of 2,3-Dihydro-2-substituted 4-Quinolones by Palladium-Catalyzed Asymmetric Allylic Alkylation
Kinetic Resolution of 2,3-Dihydro-2-substituted 4-Quinolones by Palladium-Catalyzed Asymmetric Allylic Alkylatio
Desymmetrization of Bicyclo[3.<i>n</i>.1]-3-one Derivatives by Palladium-Catalyzed Asymmetric Allylic Alkylation
Desymmetrization of carbon nucleophiles by palladium-catalyzed asymmetric allylic alkylation has been realized for the first time. Products with three chiral centers were obtained in good yield and with high diastereo- and enantioselectivity. The method offers an efficient access to optically active tropane derivatives
Kinetic Resolution of 2,3-Dihydro-2-substituted 4-Quinolones by Palladium-Catalyzed Asymmetric Allylic Alkylation
Kinetic Resolution of 2,3-Dihydro-2-substituted 4-Quinolones by Palladium-Catalyzed Asymmetric Allylic Alkylatio
Stereo- and Chemoselective Cross-Coupling between Two Electron-Deficient Acrylates: An Efficient Route to (<i>Z</i>,<i>E</i>)‑Muconate Derivatives
A Ru-catalyzed direct
oxidative cross-coupling reaction of acrylates
was developed. It offers a straightforward and atom-economical protocol
for the synthesis of functionalized (<i>Z</i>,<i>E</i>)-muconate derivatives in moderate to good yields with good stereo-
and chemoselectivities. The conjugated muconates bearing differentiable
terminal functionality can be selectively transformed into versatile
synthetic intermediates widely used in organic synthesis
Additional file 14 of Single-cell analyses reveal distinct expression patterns and roles of long non-coding RNAs during hESC differentiation into pancreatic progenitors
Additional file14. Fig. S4: The number of cells involved in metacells
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