Chemoselective Conversion of Conjugated Nitroalkenes into Ketones by Sodium Borohydride-Hydrogen Peroxide: A New Synthesis of 4-Oxoalkanoic Acids, Dihydrojasmone and (±)-exo-Brevicomin
Unsymmetrical ketones were prepared by successive alkylation of acetone dimethylhydrazone. Application of this reaction to the synthesis of dihydrojasmone is described.
α,β-Epoxy Sulfoxides as Useful Intermediates in Organic Synthesis. I. A Novel Synthesis of Dialkyl Ketones and a Synthesis of Aldehydes from Ketones by One Carbon Elongation
Treatment of α,β-epoxy sulfoxides, prepared from 1-chloroalkyl phenyl sulfoxides with ketones or aldehydes, with sodium benzeneselenolate gives dialkyl ketones or aldehydes in good yields under mild conditions. The mechanism of this reaction and an application of this process to a formal total synthesis of dihydrojasmone are described.
α- and β-Functionalized Ketones from 1,3-Dienes and Aldehydes: Control of Regio- and Enantioselectivity in Hydroacylation of 1,3-Dienes
作者:Mahesh M. Parsutkar、T. V. RajanBabu
DOI:10.1021/jacs.1c06245
日期:2021.8.18
oxidative dimerization mechanism that involves a Co(I)/Co(III) redox cycle that appears to be initiated by a cationic Co(I) intermediate. Studies of reactions using isolated neutral and cationic Co(I) complexes confirm the critical role of the cationic intermediates in these reactions. Enantioselective 1,2-hydroacylation of 2-trimethylsiloxy-1,3-diene reveals a hitherto undisclosed route to chiral siloxy-protected
The apple leaf midge and raspberry cane midge pheromones have been found to be acetoxyheptadecenone and acetoxyundecanone, respectively, and uses for the related C9-19 oxoalkyl or oxoalkenyl molecules substituted with a lower alkanoyloxy group are provided, including monitoring population levels of the midge and control of midge populations by disrupting mating patterns.
COALESCING AGENT DERIVED FROM DIOXOLANE DERIVATIVES
申请人:PTT GLOBAL CHEMICAL PUBLIC COMPANY LIMITED
公开号:US20190194157A1
公开(公告)日:2019-06-27
The present invention relates to a coalescing agent as represented in structure (I); wherein; n is integer from 1 to 8; R
1
and R
2
independently represent group selected from hydrogen atom, alkyl, alkenyl, alkynyl, phenyl, benzyl groups, or optionally cyclic hydrocarbon containing heteroatom; and Y represents group selected from alkyl, alkenyl, alkynyl, phenyl, benzyl groups, or cyclic hydrocarbon containing heteroatom. The said coalescing agent can be used in coating application with efficacy to provide smooth consistent film with chemical and scratch resistant and has no pungent odour, wherein the preparation method of this compound is simplify and employs less harmful chemicals.