Synthetic Applications of the Baylis–Hillman Adducts: A Simple Stereoselective Synthesis of (E)-3-(Nitroxymethyl)alk-3-en-2-ones
摘要:
First simple, stereoselective synthesis of (E)-3-(nitroxymethyl)alk-3-en-2-ones from Baylis-Hillman adducts (4-hydroxy-3-methylenealkan-2-ones) is described. (C) 2000 Elsevier Science Ltd. All rights reserved.
Bifunctional Polymeric Organocatalysts and Their Application in the Cooperative Catalysis of Morita–Baylis–Hillman Reactions
作者:Cathy Kar-Wing Kwong、Rui Huang、Minjuan Zhang、Min Shi、Patrick H. Toy
DOI:10.1002/chem.200601197
日期:2007.3.5
these polymeric reagents contained either alkyl alcohol or phenol groups on the polymer backbone. The use of these materials as organocatalysts in a range of Morita-Baylis-Hillman reactions indicated that hydroxyl groups could participate in the reactions and accelerate product formation. In the cases examined, phenol groups were more effective than alkyl alcohol groups for catalyzing the reactions
Amino acid ionic liquids as catalysts in a solvent-free Morita–Baylis–Hillman reaction
作者:Mathias Prado Pereira、Rafaela de Souza Martins、Marcone Augusto Leal de Oliveira、Fernanda Irene Bombonato
DOI:10.1039/c8ra02409j
日期:——
reaction between methyl vinyl ketone and aromatic aldehydes differently substituted in the absence of an additional co-catalyst under organic solvent-free conditions. The AAIL derivatives from L-valine, L-leucine, and L-tyrosine catalyzed the MBH reaction only in the presence of imidazole. The MBH adducts were obtained in moderate to good yields. Although the catalytic site in the ILs was in its enantiomerically
Novel Quinidine-Derived Organocatalysts for the Asymmetric Substitutions of O-Boc-Protected Morita-Baylis-Hillman Adducts
作者:Cheng-Kui Pei、Xiu-Chun Zhang、Min Shi
DOI:10.1002/ejoc.201100501
日期:2011.8
A series of novelquinidine-derivedorganocatalysts was synthesized and utilized for the asymmetricsubstitution of O-Boc-protectedMorita–Baylis–Hillmanadducts with various carbamates and tosylcarbamates, affording the corresponding products in good to high yields (up to 91 % yield) with moderate to high ee values (up to 96 % ee) under mild conditions.
The pure (3E)-3-(methoxymethyl)alk-3-en-2-ones and (3E)-3-(ethoxymethyl)alk-3-en-2-ones are formed in the acid induced reaction of 4-hydroxy-3-methylenealkan-2-ones with methanol and ethanol, respectively.