Formation of Acetals and Ketals from Carbonyl Compounds: A New and Highly Efficient Method Inspired by Cationic Palladium
作者:Enoch A. Mensah、Shawn D. Green、Jesse West、Tyler Kindoll、Brenda Lazaro-Martinez
DOI:10.1055/s-0039-1690497
日期:2019.9
acetals and ketals is described. This methodology relies on the nature of the palladium catalyst to direct the acetalization/ketalization reaction. This new protocol is mild and proceed with a very low catalyst loading at ambient temperatures. The method has been extended to a wide variety of different carbonyl compounds with various steric encumbrances to form the corresponding acetals and ketals in excellent
KURSANOV, D. N.;BOLESTOVA, G. I.;IBATULLIN, U. G.;KURAMSHINA, EH. A.;PARN+, ZH. ORGAN. XIMII, 1985, 21, N 11, 2274-2282
作者:KURSANOV, D. N.、BOLESTOVA, G. I.、IBATULLIN, U. G.、KURAMSHINA, EH. A.、PARN+
DOI:——
日期:——
SOLID CATALYST FOR OLEFIN POLYMERIZATION AND PROCESS FOR PRODUCING OLEFIN POLYMER
申请人:Sumitomo Chemical Company, Limited
公开号:US20130072648A1
公开(公告)日:2013-03-21
A solid catalyst for olefin polymerization and a process for producing an olefin polymer are provided. The polymer has a small content of a component which is dissolved out into a low temperature organic solvent, such as a low-molecular weight component and an amorphous component. The solid catalyst is obtained by bringing a solid catalyst component for olefin polymerization containing a titanium atom, a magnesium atom, a halogen atom, and an aliphatic carboxylate; an organoaluminum compound; and a compound represented by formula (I) into contact with each other:
wherein R
1
is a hydrocarbyl group having 1 to 10 carbon atoms, R
2
is a hydrogen atom, a halogen atom or a hydrocarbyl group having 1 to 16 carbon atoms, and the R
1
the R
2
groups are independently the same or different, and the respective R
1
groups and R
2
groups may be joined with each other to form a ring.
Carswell; Adkins, Journal of the American Chemical Society, 1928, vol. 50, p. 239
作者:Carswell、Adkins
DOI:——
日期:——
A Facile Procedure for Acetalization of Aldehydes and Ketones Catalyzed by Cerium(III) Trifluoromethanesulfonate
作者:Fumiaki Ono、Yoshiko Inatomi、Yuusuke Tada、Masaki Mori、Tsuneo Sato
DOI:10.1246/cl.2009.96
日期:2009.1.5
Aldehydes and ketones are readily protected in the presence of trialkyl orthoformate and a catalytic amount of cerium(III) trifluoromethanesulfonate under mild conditions to give the corresponding ...