5445-95-4Relevant academic research and scientific papers
Improved Process for the Palladium-Catalyzed C-O Cross-Coupling of Secondary Alcohols
Zhang, Hong,Ruiz-Castillo, Paula,Schuppe, Alexander W.,Buchwald, Stephen L.
supporting information, p. 5369 - 5374 (2020/07/14)
An improved protocol for the Pd-catalyzed C-O cross-coupling of secondary alcohols is described. The use of biaryl phosphine L2 as the ligand was key to achieving efficient cross-coupling of (hetero)aryl chlorides with only a 20percent molar excess of the alcohol. Additionally, we observed an unusual reactivity difference between an electron-rich aryl bromide and the analogous aryl chloride, and deuterium-labeling suggested that currently unidentified pathways for reduction play an important role in explaining this disparity.
Iron-catalysed cross-coupling of halohydrins with aryl aluminium reagents: A protecting-group-free strategy attaining remarkable rate enhancement and diastereoinduction
Kawamura, Shintaro,Kawabata, Tatsuya,Ishizuka, Kentaro,Nakamura, Masaharu
supporting information; experimental part, p. 9376 - 9378 (2012/09/22)
Non-protected halohydrins are cross-coupled with aryl aluminium reagents to produce aryl alkanols in the presence of the iron-bisphosphine catalysts. Remarkable reaction rate enhancement and diastereoinduction are realized by the in situ generated aluminium alkoxides, offering a new method for the reactivity and selectivity control of the iron-catalysed cross-coupling reaction.
One-pot sequence for reductive-acetylation of carbonyl compounds with (N-methylimidazole)(tetrahydroborato)zinc complex
Setamdideh, Davood,Khezri, Behrooz
experimental part, p. 5766 - 5772 (2012/07/28)
Reductive-acetylation of variety of aliphatic and aromatic aldehydes and ketones, α,β-unsaturated carbonyl compounds are examined efficiently with (N-methylimidazole)(tetrahydroborato)zinc complex, [Zn(BH4) 2(nmi)], under mild condition in THF at room temperature or reflux conditions. The corresponding acetates were obtained in excellent yields (90-98 %).
A facile and efficient one-step conversion of alcohol triphenylmethyl ethers to the corresponding acetates
Kobayashi, Kumiko,Watahiki, Tsutomu,Oriyama, Takeshi
, p. 484 - 486 (2007/10/03)
Alcohol triphenylmethyl (trityl) ethers were readily and efficiently transformed into the corresponding acetates by reaction with acetyl bromide. Triphenylmethyl ethers can also be transformed into the corresponding substituted acetates in high yields by the use of various substituted acetyl chlorides combined with sodium iodide.
O-acyl-4-phenyl-cyclohexanols, their salts, medicaments containing such compounds, and their use, as well as a method of preparing them
-
, (2008/06/13)
Compounds that inhibit the enzyme 2,3-epoxysqualene-lanosterol-cyclase and cholesterol biosynthesis, of the formula I STR1 wherein n denotes the number 0 or 1, m denotes the number 1 or 2, p denotes the number 0 or 1, R1 and R2 each denote hydrogen, lower alkyl, alkenyl or alkynyl, which may optionally also be substituted, or together with the nitrogen atom between the denote 5- to 7-membered saturated, monocyclic or heterocyclic rings which may optionally also be interrupted by an oxygen or sulfur atom or by an imino group, R3, R4, R5 and R6 denote hydrogen or lower alkyl, R5 additionally denotes lower alkoxy, R7 denotes hydrogen, cycloalkyl, phenyl or substituted phenyl, naphthyl, tetrahydronaphthyl, thienyl, furyl or pyridyl and A denotes a chemical bond or alkyl, alkenyl having up to 17 carbon atoms.
O-acyl-4-phenyl-cyclohexanols, their salts, medicaments containing such compounds and their use, as well as a method of preparing them
-
, (2008/06/13)
This document describes O-acyl-4-phenyl-cycloalkanols of general formula I STR1 wherein n denotes the number 0 or 1, m denotes the number 1 or 2, p denotes the number 0 or 1, R1 and R2 each denote hydrogen, lower alkyl, alkenyl or alkynyl, which may optionally also be substituted, or together with the nitrogen atom between them denote 5- to 7-membered saturated, monocyclic, heterocyclic rings which may optionally also be interrupted by an oxygen or sulphur atom or by an imino group, R3, R4, R5 and R6 denote hydrogen or lower alkyl, R5 additionally denotes lower alkoxy, R7 denotes hydrogen, cycloalkyl, phenyl or substituted phenyl, naphthyl, tetrahydronaphthyl, thienyl, furyl or pyridyl and A denotes a chemical bond or alkyl, alkenyl or alkynyl having up to 17 carbon atoms, and also processes for preparing them, pharmaceutical compositions containing these compounds and the use of these pharmaceutical compositions which intervene in cholesterol biosynthesis. The antihypercholesterolaemic substances can be used for the treatment and prophylaxis of atherosclerosis; they inhibit the enzyme 2,3-epoxysqualene-lanosterol-cyclase.
A One-step and Chemoselective Conversion of Silyl-protected Alcohols into the Corresponding Acetates
Oriyama, Takeshi,Oda, Mihoko,Gono, Junko,Koga, Gen
, p. 2027 - 2030 (2007/10/02)
A reagent system of acetyl bromide combined with a catalytic amount of tin(II) bromide cleaves readily trialkylsilyl ethers to give the corresponding acetates in high yields under very mild conditions.
LIQUID-CRYSTALLINE COMPOUNDS OF THE ALICYCLIC SERIES III. SYNTHESIS AND ISOMORPHISM OF ETHERS AND ESTERS CONTAINING THE PHENYLCYCLOHEXANE FRAGMENT
Karamysheva, L. A.,Torgova, S. I.,Agafonova, I. F.,Geivandov, R. Kh.,Bykova, V. V.,Burylin, P. A.
, p. 736 - 741 (2007/10/02)
A series of ethers and esters exhibiting mesomorphous characteristics were obtained from para-X-substituted trans-4-phenylcyclohexanols, trans-4-phenylcyclohexanecarboxylic acids (X = H, F, I, NO2, NH2, CN) and trans-1-hydroxymethyl-4-(p-cyanophenyl)cyclohexane.
