558-30-5Relevant articles and documents
-
Sato,Cvetanovic
, p. 970,1668 (1958)
-
Dioxirane epoxidations of 1,1-disubstituted ethylenes. Probing for radical pathways by computations and experiments
Liu,Houk,Dinoi,Fusco,Curci
, p. 8565 - 8569 (1998)
-
Method for epoxidizing small-molecular olefin
-
Paragraph 0180-0181; 0214-0215, (2021/06/06)
The invention relates to a micromolecular olefin epoxidation method, which is characterized by comprising the following steps: contacting micromolecular olefin, an organic peroxide and a titanium-silicon composite oxide under epoxidation reaction conditions of at least two reaction temperatures of A and B to obtain an alkylene oxide-containing product, wherein the A is 80-95 DEG C, the B is 100-120 DEG C, the titanium-silicon composite oxide is of an amorphous structure, is formed by aggregation of nano-particles and has mesopores in the range of 16-50 nm, the ratio of the volume of the mesopores to the total pore volume is larger than or equal to 80%, and the volume of the mesopores is larger than or equal to 0.5 cm/g. According to the method, the amorphous titanium-silicon-titanium-silicon composite oxide is taken as the catalyst, and at least two sections of conditions with different reaction temperatures are combined, so that compared with the prior art, the catalyst is stable in structure, low in cost, high in olefin epoxidation reaction activity and good in product selectivity.
Method for synthesizing isovaleraldehyde
-
Paragraph 0033; 0035; 0038; 0040; 0043; 0045, (2020/12/05)
The invention provides a synthetic method of 3-methylcrotonaldehyde. The method comprises the following steps that epoxy isobutane is subjected to a hydroformylation reaction, hydroxy isovaleraldehydeis obtained, hydroxy isovaleraldehyde is subjected to an intramolecular dehydration reaction, and 3-methylcrotonaldehyde is obtained. The synthetic method of 3-methylcrotonaldehyde does not need harsh reaction conditions.
PROCESS FOR PREPARING 3-HYDROXY-3-METHYLBUTYRATE (HMB) AND SALTS THEREOF
-
Page/Page column 8, (2020/10/31)
The present invention pertains to a process for preparing 3-hydroxy-3-methylbutyrate (HMB) or a salt thereof, the method comprising (a) reacting isobutylene oxide with cyanide in order to obtain 3- hydroxy-3-methylbutyronitrile, and (b) hydrolyzing the 3-hydroxy-3-methylbutyronitrile obtained in step (a) in order to obtain HMB, wherein hydrolysis step (b) is performed using either at least one nitrilase enzyme or, alternatively, using a combination of enzymes, said combination comprising at least one nitrile hydratase and at least one amidase.