Regioselectivity in electrochemical additions of the allyl groups in substituted allyl halides to α,β-unsaturated esters or acetone
作者:Shohei Satoh、Hiroshi Suginome、Masao Tokuda
DOI:10.1016/s0040-4039(01)90471-x
日期:1981.1
Electrochemical additions of the allyl groups in substituted allyl halides to some α,β-unsaturated esters took place in a regioselective manner at either of their α-or γ-carbon terminus, whereas regioselectivity in the addition to acetone was found to be controlled by changing a cathode material or an electrolytic potential.
Electrochemical Additions of the Allyl and the Benzyl Groups of Allyl and Benzyl Halides to Acetone
作者:Shohei Satoh、Hiroshi Suginome、Masao Tokuda
DOI:10.1246/bcsj.56.1791
日期:1983.6
hexamethylphosphoric triamide containing 0.5 M tetrabutylammonium perchlorate gave an addition product, 2-methyl-4-penten-2-ol, in a 53% yield. Allyl groups of 1-chloro-2-methyl-2-propene, 1-chloro-2-butene(3), 3-chloro-1-butene(4), 1-chloro-3-methyl-2-butene(5), and 3-chloro-3-methyl-1-butene(6), and benzyl groups of benzyl chloride, benzyl bromide, and 1-chloro-1-phenylethane can similarly be added to acetone by
2,2,5,5-Tetramethyltetrahydrofuran (TMTHF): a non-polar, non-peroxide forming ether replacement for hazardous hydrocarbon solvents
作者:Fergal Byrne、Bart Forier、Greet Bossaert、Charly Hoebers、Thomas J. Farmer、James H. Clark、Andrew J. Hunt
DOI:10.1039/c7gc01392b
日期:——
traditional ethers, due to the concealment of the ethereal oxygen by four bulky methyl groups at the alpha-position. As such, this molecule exhibits similar solvent properties to common hydrocarbon solvents, particularly toluene. Its solvent properties have been proved by testing its performance in Fischer esterification, amidation and Grignard reactions. TMTHFs differences from traditional ethers is further
[EN] PREPARATION OF TMTHF<br/>[FR] PRÉPARATION DE TMTHF
申请人:NITTO BELGIUM NV
公开号:WO2018033635A1
公开(公告)日:2018-02-22
The invention relates to a process for the preparation of 2,2,5,5- tetramethyltetrahydrofuran (TMTHF) comprising contacting a TMTHF precursor with a solid catalyst, wherein the TMTHF precursor is 2,5-dimethylhexane-2,5-dioland/or 2,5-dimethyl-4- hexen-2-ol,and wherein the solid catalyst is a beta zeolite. It also relates to the use of a beta zeolite catalyst for this process. It also relates to the use of the TMTHF produced by the process of the invention as solvent.
Method for producing an alkene comprising the step of converting an alcohol by an enzymatic dehydration step
申请人:Marliere, Philippe
公开号:EP2336340A1
公开(公告)日:2011-06-22
Described is a method for producing an alkene comprising the step of converting an alcohol by an enzymatic dehydration step. The conversion preferably makes use of a prenyl isoflavonoid hydratase, in particular of a kievitone hydratase (EC 4.2.1.95) or of a phaseollidin hydratase (EC 4.2.1.97). Moreover, the present invention describes a recombinant organism which produces an alcohol and which expresses a hydratase enzyme which is capable of catalyzing the conversion of said alcohol into an alkene.