Cyclic and acyclic 1,3,3'-triketones were prepared by the reactions adopting beta -diketones and anhydrides in the presence of barium or strontium hydrides in high yields. Crystal structure of 4-acetyl-2,2,6,6-tetramethyl-3,5-heptanedione (3a) represented the dorminant keto form and provided evidence for intermolecular C-H . . .O hydrogen bonds (average C . . .O distance; 3.437 Angstrom, average C-H . . .O angle. 169.25 degrees). (C) 2001 Elsevier Science Ltd. All rights reserved.
PROCESSES FOR THE SYNTHESIS OF DIARYLTHIOHYDANTOIN AND DIARYLHYDANTOIN COMPOUNDS
申请人:Medivation Prostate Therapeutics LLC
公开号:EP2538785B1
公开(公告)日:2018-03-21
COMPOSITION AND POLYMER
申请人:Asahi Kasei Kabushiki Kaisha
公开号:EP2735581B1
公开(公告)日:2021-07-14
Composition and Polymer
申请人:Nakamura Akitake
公开号:US20140121293A1
公开(公告)日:2014-05-01
Disclosed is a composition comprising (A) at least one compound selected from the group consisting of an ether compound having two or more ether groups, a trivalent phosphorus compound, and a ketone compound, (B) a boron trihalide, and (C) an episulfide compound.