Easy selective generation of (lithiomethyl)cyclopropane or homoallyllithium by a chlorine–lithium exchange
作者:Isidro M. Pastor、Itziar Peñafiel、Miguel Yus
DOI:10.1016/j.tetlet.2008.09.100
日期:2008.11
The reaction of (chloromethyl)cyclopropane 5 with lithium and a catalytic amount of DTBB (5 mol %) in the presence of different carbonyl compounds [Et2CO, n-Pr2CO, (c-C3H5)2CO, (CH2)5CO, PhCOMe, t-BuCHO, i-PrCHO, PhCHO] as electrophiles in THF at −78 °C leads, after hydrolysis with water, to the corresponding cyclopropyl alcohols 6. However, when the same starting material is lithiated using naphthalene
Cyclopropylmethyl- and cyclobutylmethyllithium by an arene-catalyzed lithiation. Stability and reactivity
作者:Itziar Peñafiel、Isidro M. Pastor、Miguel Yus
DOI:10.1016/j.tet.2010.02.090
日期:2010.4
presence of different carbonyl compounds as electrophiles, in THF at −78 °C leads, after hydrolysis, to the corresponding cycloalkyl alcohols 6 and 9, respectively. However, when the same starting materials are lithiated using naphthalene as catalyst in diethylether and at higher temperature (0 or 25 °C), and then react with the same electrophiles, the final hydrolysis yields the corresponding unsaturated
[EN] SUBSTITUTED IMIDAZOLE COMPOUND AND USE THEREOF<br/>[FR] COMPOSÉ D'IMIDAZOLE SUBSTITUÉ ET SON UTILISATION
申请人:TAKEDA PHARMACEUTICAL
公开号:WO2008139941A1
公开(公告)日:2008-11-20
[EN] The present invention relates to a compound represented by the formula: wherein each symbol is as defined in the description, or a salt thereof or a prodrug thereof. The compound of the present invention has a superior renin inhibitory activity, and thus is useful as an agent for the prophylaxis or treatment of hypertension, various organ damages attributable to hypertension, and the like. [FR] La présente invention concerne un composé représenté par la formule : dans laquelle chaque symbole est tel que défini dans la description, ou l'un de ses sels ou précurseurs. Le composé de la présente invention possède une activité supérieure d'inhibition de la rénine et est ainsi utile en tant qu'agent destiné à la prophylaxie ou au traitement de l'hypertension, de diverses lésions d'organes attribuables à l'hypertension et analogues.
Mechanochemical Simmons–Smith cyclopropanation<i>via</i>ball-milling-enabled activation of zinc(0)
作者:Lorenzo Pontini、Jamie A. Leitch、Duncan L. Browne
DOI:10.1039/d3gc00649b
日期:——
The bulk solvent-free synthesis of cyclopropanesviaa ball-milling-enabled Simmons–Smith reaction is herein described.