Carboxylation and Mitsunobu Reaction of Amines to Give Carbamates: Retention vs Inversion of Configuration Is Substituent-Dependent
作者:Christopher J. Dinsmore、Swati P. Mercer
DOI:10.1021/ol0491080
日期:2004.8.1
A mild method for the synthesis of carbamates from amino alcohols involves sequential carboxylation with carbon dioxide, followed by a Mitsunobu reaction. Unexpectedly, the stereochemical course of the Mitsunobu reaction is dependent on whether the carbamic acid intermediate is N-substituted with hydrogen (retention) or carbon (inversion).
outer-sphere C–Hamidations discovered by high-throughput experimentation. Using a diverse repertoire of Cp-tunable group 9 [CpXMCl2]2 precatalysts in combination with bidentate LX-type co-ligands, we have established a premixing protocol for the fast and convenient in situ generation of an array of half-sandwich metal complexes. Benefitting from the designed multidimensional approach to simultaneously
Solvent Effects on the Chemo‐ and Site‐Selectivity of Transition Metal‐Catalyzed Nitrene Transfer Reactions: Alternatives to Chlorinated Solvents**
作者:Robert M. Ward、Yun Hu、Noah P. Tu、Jennifer M. Schomaker
DOI:10.1002/cssc.202300964
日期:2024.1.8
A high-throughput experimentation protocol for heterogeneous nitrene transfer (NT) reactions was used to identify replacements for chlorinated solvents. Selected catalysts for NT, including silver supported by N-dentate ligands, dinuclear Rh complexes and Fe/Mn phthalocyanine catalysts, were compared and contrasted using our HTE protocol in terms of both yields and selectivity.
[EN] CHOLESTERYL ESTER TRANSFER PROTEIN INHIBITORS<br/>[FR] INHIBITEURS DE PROTEINE DE TRANSFERT DES ESTERS DE CHOLESTEROL
申请人:MERCK & CO INC
公开号:WO2007081570A2
公开(公告)日:2007-07-19
[EN] Compounds of Formula (I), including pharmaceutically acceptable salts of the compounds, are CETP inhibitors, and are useful for raising HDL-cholesterol, reducing LDL-cholesterol, and for treating or preventing atherosclerosis. In the compounds of Formula (I), A1 is a cyclic group, and B is a cyclic group which is attached to the heterocyclic ring directly or through a methylene group. [FR] Des composés à structure de formule (I), y compris des sels pharmaceutiquement acceptables de ces composés, sont des inhibiteurs de CETP qui s'avèrent utiles pour augmenter le cholestérol HDL, réduire le cholestérol LDL, traiter ou prévenir l'athérosclérose. Dans les composés de formule (I), A1 et B sont des groupes cycliques, B étant lié au noyau hétérocyclique directement ou par un groupe méthylène.