An efficient method for the enantioselective synthesis of cyclic ureas has been developed through Pd-catalyzed asymmetric allylic cycloaddition of readily accessible nitrogen-containing allylic carbonates with isocyanates. By using a palladium complex in situ generated from Pd2(dba)3·CHCl3 and phosphoramidite L1 or L3 as a ligand under mild reaction conditions, the process afforded imidazolidinones
Palladium-catalyzed double allylic alkylation of indole-2-hydroxamates: easy access to pyrazino[1,2-a]indole derivatives
作者:Sébastien Laliberté、Peter K. Dornan、Austin Chen
DOI:10.1016/j.tetlet.2009.11.031
日期:2010.1
The synthesis of pyrazino[1,2-a]indoles via a palladium-catalyzed double allylic alkylation of indole-2-hydroxamates is described. The reaction conditions are very mild and allow for a wide variety of substitutions on the indole core.
描述了通过钯催化的吲哚-2-异羟肟酸酯的双烯丙基烷基化反应合成吡嗪并[1,2- a ]吲哚。反应条件非常温和,并允许在吲哚核上进行各种各样的取代。
3,6-BRIDGED TYLOSIN DERIVATIVES
申请人:Qiu Yao-Ling
公开号:US20080039406A1
公开(公告)日:2008-02-14
The present invention discloses compounds of formula I, or pharmaceutically acceptable salts, esters, or prodrugs thereof:
which exhibit antibacterial properties. The present invention further relates to pharmaceutical compositions comprising the aforementioned compounds for administration to a subject in need of antibiotic treatment. The invention also relates to methods of treating a bacterial infection in a subject by administering a pharmaceutical composition comprising the compounds of the present invention. The invention further includes process by which to make the compounds of the present invention.
The present invention discloses compounds of formulae I and II, or pharmaceutically acceptable salts, esters, or prodrugs thereof:
which exhibit antibacterial properties. The present invention further relates to pharmaceutical compositions comprising the aforementioned compounds for administration to a subject in need of antibiotic treatment. The invention also relates to methods of treating a bacterial infection in a subject by administering a pharmaceutical composition comprising the compounds of the present invention. The invention further includes process by which to make the compounds of the present invention.
Syntheses of 2-Vinyl-2,3-dihydropyrroles and 3-Methylene-1,2,3,4-tetrahydropyridines by Palladium-Catalyzed Cyclization of N-Tosyl Imines with Allylic Diesters
作者:Masahiro Yoshida、Kouki Kinoshita、Kosuke Namba
DOI:10.3987/com-16-s(s)33
日期:——
A palladium-catalyzed cyclization of N-tosyl imines with allylic diesters is described. The reactions of N-tosyl imines with 2-buten-1,4-diol dicarbonate and 2-methylene-1,3-propanediol diacetate afforded 2-vinyl-2,3-dihydropyrroles and 3-methylene-1,2,3,4-tetrahydropyridines, respectively.