Oxindole synthesis by palladium-catalysed aromatic C–H alkenylation
作者:Satoshi Ueda、Takahiro Okada、Hideko Nagasawa
DOI:10.1039/b926560k
日期:——
A strategy involving palladium-catalysed aromatic C-H functionalisation/intramolecular alkenylation provides a convenient and direct synthesis of 3-alkylideneoxindoles. In the presence of 5 mol% of PdCl(2)MeCN(2) and AgOCOCF(3), a wide variety of N-cinnamoylanilines gave 3-alkylideneoxindoles in moderate to good yield.
Synthesis of (
<i>E</i>
)‐3‐Alkylideneindolin‐2‐ones by an Iron‐Catalyzed Aerobic Oxidative Condensation of Csp
<sup>3</sup>
–H Bonds of Oxindoles and Benzylamines
作者:Kovuru Gopalaiah、Ankit Tiwari
DOI:10.1002/ejoc.202001300
日期:2020.12.13
An iron‐catalyzed direct access to (E)‐3‐alkylideneindolin‐2‐ones through oxidative condensation of oxindoles with benzylamines is described. The procedure utilizes molecular oxygen as a clean and terminal oxidant.
complex: The asymmetric one‐step construction of multiplestereocenters in complex spirocyclicoxindoles was achieved with very high fidelity by using distinct organocascade reactions utilizing two organocatalysts, each activating different carbonyl compounds (see scheme; TMS=trimethylsilyl). The complementary approaches demonstrate the potential of organocascadecatalysis to face challenging synthetic
Enantioselective 1,3-Dipolar Cycloaddition of Methyleneindolinones with α-Diazomethylphosphonate to Access Chiral Spiro-phosphonylpyrazoline-oxindoles Catalyzed by Tertiary Amine Thiourea and 1,5-Diazabicyclo[4.3.0]non-5-ene
作者:Nan Huang、Liangliang Zou、Yungui Peng
DOI:10.1021/acs.orglett.7b02763
日期:2017.11.3
A methodology to access chiral 3,3′-spiro-phosphonylpyrazoline oxindoles via an asymmetric 1,3-dipolarcycloadditionreaction of substituted methyleneindolinones with α-diazomethylphosphonate in the catalysis of tertiary amine thiourea and 1,5-diazabicyclo[4.3.0]non-5-ene (DBN) has been established. This method exhibits high functional group compatibility, where a wide range of methyleneindolinones