Dual behavior of alcohols in iodine-catalyzed esterification under solvent-free reaction conditions
作者:Marjan Jereb、Dejan Vražič、Marko Zupan
DOI:10.1016/j.tetlet.2009.02.224
日期:2009.5
solvent-free reaction conditions (SFRCs) is described; the governing factor is the stability of the carboniumion generated from the alcohol; high concentration reaction conditions (HCRCs) or dilute solutions are much less suitable. In the case of benzylic alcohols, loss of optical activity was noted, whereas alkyl alcohols furnished a product with retention of stereochemistry.
Poly(N-vinylimidazole) as an efficient catalyst for acetylation of alcohols, phenols, thiols and amines under solvent-free conditions
作者:Nader Ghaffari Khaligh
DOI:10.1039/c2ra21295a
日期:——
Poly(N-vinylimidazole) is able to promote instantaneous quantitative acetylation of a variety of functionalized alcohols, phenols, thiols and amines with acetic anhydride at room temperature undersolvent-freeconditions. This new method consistently has excellent yields and the catalyst can be reused and recovered several times. Furthermore, the reaction can even be carried out on a larger scale.
A succinimide-N-sulfonic acid catalyst for acetylation reactions in absence of a solvent
作者:Farhad SHIRINI、Nader Ghaffari KHALIGH
DOI:10.1016/s1872-2067(11)60499-3
日期:2013.4
Abstract A small amount of succinimide-N-sulfonic acid efficiently catalyzed the acetylation of a variety alcohols, phenols, thiols, amines and aldehydes with acetic anhydride at room temperature under solvent free conditions. This catalyst has the advantages of excellent yields and short reaction times and the reaction can be carried out on a large scale, which makes it potentially useful for industrial
The reaction of lead tetraacetate with hydrocarbons
作者:Melvyn W. Mosher、Jeffery L. Cox
DOI:10.1016/s0040-4039(00)89242-4
日期:1985.1
The free radical reaction of leadtetraacetate with hydrocarbons has been investigated. The products of these reactions are the acetate esters. The hydrogen abstracting species from leadtetraacetate is found to have a primary to secondary to tertiary selectivity of 1:27:123 based upon relative reactivities.
[EN] NEW BENZIMIDAZOLE DERIVATIVES<br/>[FR] NOUVEAUX DÉRIVÉS DE BENZIMIDAZOLE
申请人:HOFFMANN LA ROCHE
公开号:WO2010028981A1
公开(公告)日:2010-03-18
The invention is concerned with novel benzimidazole derivatives of Formula (I) wherein A, n and R1 to R7 are as defined in the description and in the claims, as well as physiologically acceptable salts and esters thereof. These compounds act on Farnesyl X receptor (FXR) and against cholesterol and lipid illnesses, diabetes, obesity, psoriasis, cancer, osteoporosis, Parkinson's and Alzheimer's disease.