Enantioselective γ-borylation of unsaturated amides and stereoretentive Suzuki–Miyaura cross-coupling† †Electronic supplementary information (ESI) available: Catalyst optimization data; experimental procedures; compound characterization data; spectra. See DOI: 10.1039/c7sc01093a
نویسندگان
چکیده
The rhodium-catalyzed, directed catalytic asymmetric hydroboration of g,d-unsaturated amides affords a direct route to chiral acyclic secondary g-borylated carbonyl derivatives in high enantiomeric purity. In contrast to a similar b-borylated amide derivative, the g-borylated amide undergoes Suzuki–Miyaura cross-coupling with stereoretention. The utility of the boronic ester products is further illustrated by other stereospecific C–B bond transformations leading to g-amino acid derivatives, 1,4-amino alcohols, and 5-substituted-g-lactone and g-lactam ring systems.
منابع مشابه
Enantioselective γ-borylation of unsaturated amides and stereoretentive Suzuki-Miyaura cross-coupling.
The rhodium-catalyzed, directed catalytic asymmetric hydroboration of γ,δ-unsaturated amides affords a direct route to chiral acyclic secondary γ-borylated carbonyl derivatives in high enantiomeric purity. In contrast to a similar β-borylated amide derivative, the γ-borylated amide undergoes Suzuki-Miyaura cross-coupling with stereoretention. The utility of the boronic ester products is further...
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Tsinghua-Peking Centre for Life Sciences, B Department of Pharmacology and Pharm Collaborative Innovation Center for Diagno Tsinghua University, Beijing 100084, China cn MOE Key Laboratory of Bioinformatics, Sch Beijing 100084, China. E-mail: [email protected] † Electronic supplementary informati characterization data, X-ray structures CCDC 1040494. For ESI and crystallogr format see DOI: 10.1039/c5s...
متن کاملSuzuki–Miyaura cross-coupling of amides and esters at room temperature: correlation with barriers to rotation around C–N and C–O bonds† †Electronic supplementary information (ESI) available: Experimental details and characterization data. See DOI: 10.1039/c7sc02692g Click here for additional data file.
The Suzuki–Miyaura cross-coupling has been widely recognized as one of the most important methods for the construction of C–C bonds. However, in contrast to traditional aryl halide or pseudohalide electrophiles, coupling reactions with unactivated C–N and C–O electrophiles have proven significantly more challenging. Here we report the first general palladium-catalyzed Suzuki–Miyaura cross-coupl...
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