- Organocatalytic head-to-tail dimerization of methacrolein via conjugate addition of methanol: An alcohol activation mechanism proved by electrospray ionization mass spectrometry
-
The head-to-tail dimerization of methacrolein via the conjugate addition of methanol is catalyzed by various organic bases, such as an amine, phosphine, and N-heterocyclic carbene, to give 2,4-dimethyl-2-methoxymethylpentane-1,5-dial in moderate yields. Based on the interpretation of the key intermediates by electrospray ionization mass spectrometry, we propose a reaction mechanism involving the initial conjugate addition of the organic bases to methacrolein to generate a zwitterionic base followed by the activation of methanol.
- Matsuoka, Shin-Ichi,Shimakawa, Shintaro,Takagi, Koji,Suzuki, Masato
-
supporting information; experimental part
p. 6835 - 6838
(2012/01/03)
-
- 2-Ethoxymethyl and 2-methoxymethyl N-(3,5-dichlorophenyl) succinamides
-
The invention relates to a selection of succinic acid imides that have, in the 2-position, alkoxy, alkoxyalkyl or acyloxy substituents having up to 4 carbon atoms and the imine components of which are derived from aliphatic amines having up to 5 carbon atoms or from aniline optionally having up to 2 substituents. The succinic acid imides according to the invention are used as fungicides. A method for their manufacture is also disclosed.
- -
-
-