Trifluoroacetic Acid-Promoted Synthesis of 3-Hydroxy, 3-Amino and Spirooxindoles from α-Keto-N-Anilides
摘要:
Ketoanilides containing alkyl side chains were readily cyclized to 3-hydroxy-2-oxindoles or spirooxindoles by a single or double intramolecular Friedel-Crafts reaction in the presence of trifluoroacetic acid (TFA) at room temperature or at 45 degrees C. alpha-Iminocarboxamides, generated in situ from ketoamides, cyclized similarly to 3-aminooxindoles under identical conditions,
Highly Diastereo- and Enantioselective Organocatalytic Michael Addition of α-Ketoamides to Nitroalkenes
作者:Olivier Baslé、Wilfried Raimondi、Maria del Mar Sanchez Duque、Damien Bonne、Thierry Constantieux、Jean Rodriguez
DOI:10.1021/ol102289g
日期:2010.11.19
The first organocatalytic enantio- and diastereoselective conjugate addition of α-ketoamides to nitroalkenes has been achieved using a bifunctional amino thiourea catalyst. In this new approach, the substrate amide proton plays a critical role in the formation of the Michael anti-adducts in high yields and high stereoselectivities. To illustrate the high synthetic potential of this methodology, the
Adams; Bramlet; Tendick, Journal of the American Chemical Society, 1920, vol. 42, p. 2374
作者:Adams、Bramlet、Tendick
DOI:——
日期:——
AOYAMA H.; OMOTE Y.; HASEGAWA T.; SHIRAISHI H., J. CHEM. SOC. PERKIN TRANS., PART 1 <JCPK-BH>, 1976, NO 14, 1556-1558
作者:AOYAMA H.、 OMOTE Y.、 HASEGAWA T.、 SHIRAISHI H.
DOI:——
日期:——
A New Class of Tunable Dendritic Diphosphine Ligands: Synthesis and Applications in the Ru-Catalyzed Asymmetric Hydrogenation of Functionalized Ketones
作者:Baode Ma、Tingting Miao、Yihua Sun、Yanmei He、Ji Liu、Yu Feng、Hui Chen、Qing-Hua Fan
DOI:10.1002/chem.201402709
日期:2014.8.4
dendritic 2,2′‐bis(diphenylphosphino)‐1,1′‐binaphthyl (BINAP) ligands was prepared by attaching polyaryl ether dendrons onto the four phenyl rings on the P atoms. Their ruthenium complexes were employed in the asymmetric hydrogenation of β‐ketoesters, α‐ketoesters, and α‐ketoamides to reveal the effects of dendron size on the catalytic properties. The second‐ and third‐generation catalysts exhibited excellent
Trifluoroacetic Acid-Promoted Synthesis of 3-Hydroxy, 3-Amino and Spirooxindoles from α-Keto-<i>N</i>-Anilides
作者:Ioulia Gorokhovik、Luc Neuville、Jieping Zhu
DOI:10.1021/ol202263a
日期:2011.10.21
Ketoanilides containing alkyl side chains were readily cyclized to 3-hydroxy-2-oxindoles or spirooxindoles by a single or double intramolecular Friedel-Crafts reaction in the presence of trifluoroacetic acid (TFA) at room temperature or at 45 degrees C. alpha-Iminocarboxamides, generated in situ from ketoamides, cyclized similarly to 3-aminooxindoles under identical conditions,