[EN] NOVEL IMIDAZOLIDINE COMPOUNDS AS ANDROGEN RECEPTOR MODULATORS [FR] NOUVEAUX COMPOSÉS D'IMIDAZOLIDINE EN TANT QUE MODULATEURS DU RÉCEPTEUR D'ANDROGÈNE
Redox-Triggered Ruthenium-Catalyzed Remote C–H Acylation with Primary Alcohols
作者:Xiao Guo、Yang Wu、Gongqiang Li、Ji-Bao Xia
DOI:10.1021/acscatal.0c03343
日期:2020.11.6
related compounds. Prior examples for hydrogenative remote C(sp3)–H functionalization of olefins via a metal walking process featured external reducing agents. Here, we report a strategy for redox-triggered hydrogenative remote C(sp3)–H acylation of olefins with primary alcohols both as an acylating agent and a reductant, which is validated by the base-free 1,3-diketone synthesis. Mechanistic studies have
A variety of alcohols have been oxidized under mild conditions by the DMSO–Ph3P·X2 complexes. The reaction does not produce any Pummerer product. A mechanism for the reaction is proposed.
Synthesis of Alkynyl Ethers and Low-Temperature Sigmatropic Rearrangement of Allyl and Benzyl Alkynyl Ethers
作者:Juan R. Sosa、Armen A. Tudjarian、Thomas G. Minehan
DOI:10.1021/ol802147h
日期:2008.11.6
transformed into 1-alkynyl ethers 5 by a two-step procedure involving formation of the enol triflate or phosphate and base-induced elimination. Performing the same reaction sequence with allylic alcohols (R2OH, R2 = allyl) furnishes instead gamma,delta-unsaturated carboxylic acid derivatives 6, derived from [3,3]-sigmatropic rearrangement of the intermediate allyl alkynyl ethers at -78 degrees C and trapping
An efficient approach for the synthesis of 2,2-disubstituted indolin-3-ones is described. From readily accessible aryl hydrazines and allyloxyketones, 2,2-disubstituted indolin-3-ones could be obtained in good to excellent yields under mild reaction conditions via cascade Fischer indolization/Claisen rearrangement process. This protocol provides a facile entry to 2,2-disubstituted indolin-3-ones, which
Regio- and Diastereoselective Rhodium-Catalyzed Allylic Substitution with Acyclic α-Alkoxy-Substituted Copper(I) Enolates: Stereodivergent Approach to 2,3,6-Trisubstituted Dihydropyrans
作者:P. Andrew Evans、Michael J. Lawler
DOI:10.1021/ja049080n
日期:2004.7.1
copper(I) enolates derived from alkyl protected acyclic alpha-alkoxy aryl ketones. This study suggests that the ability to form a chelated enolate intermediate is crucial for obtaining high diastereoselectivity, whereas excellent regioselectivity is obtained regardless of the substituent. Hence, the excellent selectivity coupled with the synthetic utility of alpha-alkoxy aryl ketone enolates makes this