4.6 Article

Asymmetric [3+2] annulation of N-protected isatins with but-3-yn-2-one catalyzed by DIOP: facile creation of enantioenriched spiro[furan-2,3′-indoline]-2′,4(5H)-dione

Journal

ORGANIC & BIOMOLECULAR CHEMISTRY
Volume 10, Issue 40, Pages 8048-8050

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/c2ob25801c

Keywords

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Funding

  1. Shanghai Municipal Committee of Science and Technology [11JC1402600]
  2. National Basic Research Program of China (973) [2010CB833302]
  3. Fundamental Research Funds for the Central Universities
  4. National Natural Science Foundation of China [21072206, 20872162, 20672127, 20732008, 21121062, 20702013]

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DIOP catalyzed highly enantioselective [3 + 2] annulation of N-protected isatins with but-3-yn-2-one has been disclosed, allowing the synthesis of enantioenriched spiro[furan-2,3'-indoline]-2',4(5H)-dione in moderate yields along with good to high enantioselectivities under mild conditions.

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