Facile and Selective Deallylation of Allyl Ethers Using Diphosphinidenecyclobutene-Coordinated Palladium Catalysts
摘要:
(pi-Allyl)palladium triflate bearing a 1,2-bis(4-methoxyphenyl)-3,4-bis(2,4,6-tri-tert-butylphenylphosphinidene)cyclobutene ligand (DPCB-OMe), [Pd(eta(3)-C3H5)(DPCB-OMe)]OTf, efficiently catalyzes deallylation of a variety of allyl ethers in aniline to give corresponding alcohols in high yields under mild conditions. The reactions can be performed in air without loss of a variety of functionalities including vinyl, alkynyl, hydroxy, acetoxy, silyloxy, and acetal groups. Allyl 2-allyloxybenzoate selectively undergoes deallylation of the allyloxy group to give allyl salicylate in quantitative yield.
作者:John F. Reichwein、Mittun C. Patel、Brian L. Pagenkopf
DOI:10.1021/ol016989r
日期:2001.12.1
Parameters influencing the selectivity of the (PPh(3))(3)RhCl-catalyzed hydrophosphorylation of olefins and enynes are described. The reaction between differentiated dienes was shown to be highly responsive to olefin substitution. The trimethylsilyl group effectively reversed the normal preference for hydrophosphorylation of an alkyne over an alkene. [reaction: see text]
complex in combination with quinaldic acid shows high reactivity and chemoselectivity for the catalytic deprotection of hydroxyl groups protected as allyl ethers. The catalyst operates in alcoholic solvents without the need for any additional nucleophiles, satisfying the practical requirements of operational simplicity, safety, and environmental friendliness. The wide applicability of this deprotection
Method of removing allyl series protecting group using novel ruthenium complex and method of synthesizing allyl ethers
申请人:Kitamura Masato
公开号:US20050203317A1
公开(公告)日:2005-09-15
A cyclopentadienyl ruthenium (II) complex or (iv) complex having an α-imino acid type ligand or an α-amino acid type ligand.
一个具有α-亚胺酸型配体或α-氨基酸型配体的环戊二烯基钌(II)配合物或(IV)配合物。
Catalytic and Enantioselective Route to Medium-Ring Heterocycles. Asymmetric Zirconium-Catalyzed Ethylmagnesation of Seven- and Eight-Membered Rings
作者:Michael S. Visser、Nicola M. Heron、Mary T. Didiuk、John F. Sagal、Amir H. Hoveyda
DOI:10.1021/ja960163g
日期:1996.1.1
A variety of medium-ring heterocycles, prepared efficiently by the Ru-catalyzed diene metathesis method, undergo asymmetric catalytic ethylmagnesation to afford nonracemic unsaturated alcohols and ...
ORGANIC SILANE COMPOUND FOR FORMING SI-CONTAINING FILM BY PLASMA CVD AND METHOD FOR FORMING SI-CONTAINING FILM
申请人:Hamada Yoshitaka
公开号:US20100137626A1
公开(公告)日:2010-06-03
An organic silane compound for forming a Si-containing film by plasma CVD is provided. The silane compound contains 2 or more silicon atoms bonded by an intervening straight chain or branched oxygen-containing hydrocarbon chain having 4 to 8 carbon atoms containing a bond represented by C
p
—O—C
q
wherein p and q independently represent number of carbon atoms with the proviso that 2≦p≦6 and 2≦q≦6 and the carbon chains do not contain an unsaturated bond which conjugates with the oxygen atom, wherein all of the 2 or more silicon atoms has 1 or more hydrogen atom or an alkoxy group having 1 to 4 carbon atoms.