一种切断酰胺C—N键的简便方法

研究了一种质子酸和Lewis酸共同催化酰胺C—N键断键的新方法,讨论了温度,CuCl2量以及Lewis酸种类对C—N键断键率的影响,并提出了在此条件下酰胺C—N键断裂的可能机理.新方法反应温度低、耗酸量小、条件温和.     

A Simple and Convenient Method for Preparation of Sulfides

Tetraethylammonium hydrogen carbonate (TEAHC) and tetraethylammonium carbonate (TEAC) obtained respectively by chemical and electrochemical way, react with thiols in acetonitrile affording, after addition of a suitable alkylating reagent, the corresponding sulfides in high to excellent yields.     

A Simple and Convenient Method for the Oxidation of Sulphides

Sulphides are efficiently oxidized to either sulphoxides or sulphones as required by treatment with acetonitrile/hydrogen peroxide and potassium carbonate in methanolic solution.     

A Simple Convenient Method for the Synthesis of 1-Iodoalkynes

Reaction of terminal alkynes with ethylmagneslum bromide In THF followed by the addition of lodine In THF gives 1-lodoalkynes In excellent yields (90–96%).     

关于中心原子杂化轨道数的计算方法

对于HmABn型的共价分子（或离子）,本文提出用公式G=V／2-3n计算中心原子A的杂化轨道数,并由此确定对应的杂化轨道类型。该方法简单、直接、有效。     

确定等价双电子组态原子光谱项的简便方法

根据Pauli原理 ,即原子体系中完全波函数必须是反对称的要求 ,提出一种推测等价双电子组态原子光谱项的方法。以推测 (np) 2 ,(nd) 2 ,(nf) 2 组态光谱项为例 ,说明该方法是学习原子光谱项过程中容易理解、便于掌握的简便方法     

Sodium Percarbonate: A Convenient Reagent for Oxidative Cleavage of A-Diketones

Sodium percarbonate has been found to be a mild and effective reagent for the oxidative cleavage of a-diketones to carboxylic acids     

A Simple and Convenient Method for the Deprotection of Tetrahydropyranyl Ether Using Iodine in Methanol

A simple and efficient method for the -deprotection of tetrahydropyranyl and 4,4′-dimethoxytrityl ethers using iodine in methanol is described.     

A Simple and Convenient Synthesis of Pyrazinones

Pyrazinones were synthesized by reacting mesoionic azlactone [2‐aryl‐4‐methyl‐Δ²‐oxaxolin‐5‐one] and 1,4‐diazabutadienes in good yields at room temperature.     

A Convenient Synthesis of Simple Tetrahydroisoquinolines

Various simple tetrahydroisoquinoline alkaloids (Ia, b, c, IIa and IIIa, b, c) have been synthesized by the reaction of appropriate arylethylamines with paraformaldehyde or formaldehyde in formic acid.     

1,3,5-三苯基苯的简便合成方法

采用氯化亚砜-无水乙醇为催化剂，以苯乙酮为原料一步合成了1，3，5-三苯基苯。研究了最佳反应配比和反应条件：反应时间为45～60min时，n(苯乙酮)／n(氯化亚砜)／n(乙醇)=3／15／5时反应产率达到最高，产率80％～85％，并对反应机理进行了讨论。     

A Simple and Convenient Synthesis of Glycosyl Azides

Treatment of glycosyl halides with NaN₃ in aqueous acetone or acetonitrile is a convenient method for the stereoselective synthesis of 1,2-trans-per-O-acetyl-glycosyl azides.     

Simple and Convenient Method for the Synthesis of Aryltellurophosphates Catalyzed by Cesium Hydroxide

In the presence of a catalytic amount cesium hydroxide, the corresponding aryltellurophosphates can be obtained by the reactions of dialkyl phosphites with diaryl ditellurides in excellent yield at room temperature, using dimethylsulfoxide as solvent. The possible reaction mechanism was discussed. The method could provide a new and expedient path for the preparation of aryltellurophosphates.     

A Simple and Convenient Method of Standardization of Piper longum — An Ayurvedic Medicinal Plant

JPC – Journal of Planar Chromatography – Modern TLC - The dried fruits of Piper longum are extensively used in Ayurvedic medicinal preparations. A simple and convenient HPTLC method has...     

A Simple and Convenient Method for Syntheses of Phenolic Amino Aldehyde Ligands,enalH2 and tnalH2

New efficient methods for synthesis of enalH₂ or 1,6-bis(2-pyridyl)-2,5-bis(2-hydroxy-3-formyl-5-methylbenzyl)-2,5-diazahexane 1a and of tnalH₂ or 1,7-bis(2-pyridyl) -2,6-bis(2-hydroxy-3-formyl-5-methylbenzyl)-2,6-diazaheptane, 1b are described     

A Convenient Method for Synthesis of Gem-bromochlorocyclopropanes

Gem-bramochlorocyclopropanes can be prepared by a convenient method based on the reaction of the mixtures of haloforms and tetrahalomethanes or hexahaloethane with powdered sodium hydroxide.     

Methylammonium Fluoride (MAF): A Convenient Reagent for Si-O Bond Cleavage

Crude Methylammonium fluoride prepared in a usual way⁶ is a very convenient reageant for Si-O bond cleavage. MAF is easy to prepare, easy to store and provides the desired deprotected alcohols without workup.     

A Convenient Synthetic Method for 3-Trimethylsilylbutenone

Convenient synthetic method for 2-trimethyl-silylbutenone from acrolein is presented.     

A Convenient Method of Polyfluoroalkyl—lactonization

A novel synthesis of polyfluoroalkyl substituted γ-butyrolacones from the reaction of polyfluoroalkyl iodides with 4-pentenoic acid initiated with sodium dithionite was realized in good yields.