Chemoselective Protection and Deprotection of Aldehydes Using Solid Supported Reagent (Silica Chloride) under Solvent-Free Conditions

Silica chloride, a heterogeneous catalyst, has been found to be an efficient catalyst for the protection of aldehydes as acylals under solvent-free conditions, and deprotection of acylals to aldehydes in methanol as a solvent occurred. The reaction takes a shorter time and ensures good to excellent yield of the products

Cavitational Chemistry: A Mild and Efficient multi-component Synthesis of amidoalkyl-2-naphthols Using Reusable Silica Chloride as Catalyst under Sonic Conditions

An efficient and direct procedure for the synthesis of amidoalkyl-2-naphthol derivatives has been described. The process employs a three-component cyclocondensation reaction in one-pot using β-naphthol, aromatic aldehyde and acetamide or benzamide in the presence of silica chloride accelerated by ultrasound giving the product in excellent yield in very short duration

Ultrasound promoted regioselective synthesis of beta-iodoethers from olefin-I2-alcohol.

Regioselective synthesis of beta-iodoethers in high yields by sonicating alkene and alcohol in the presence of iodine in a bath at 35 kHz is reporte

Ultrasound assisted synthesis of δ-chloroesters from tetrahydrofuran and acyl chlorides in the presence of catalytic zinc dust

Sonication of acyl chlorides and dry tetrahydrofuran (THF) in the presence of catalytic amounts of zinc dust at 35 kHz gives δ-chloroesters in high yields. © 2005 Elsevier B.V. All rights reserved

ChemInform Abstract: Base‐Catalyzed Rearrangement of Terpinolene Oxide.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option

Simple and efficient protocol for the synthesis of novel dihydro-1H-pyrano2,3-cpyrazol-6-ones via a one-pot four-component reaction

Ba(OH) 2 catalyzed simple and efficient one-pot four-component reaction of Meldrums acid, ethyl acetoacetate, hydrazine hydrate, and aromatic aldehydes to give 3-methyl-4-aryl-4,5-dihydro-1H-pyrano2,3-cpyrazol-6-ones in refluxing water is reported. The yields are high and the reactions go to completion in 1-2 h. © 2012 Elsevier Ltd. All rights reserved

Cerium(III) Chloride: A Highly Efficient Reagent for the Synthesis of α‐Aminonitriles

We report a highly efficient, one‐pot, three‐component condensation of carbonyl compounds, amines, and TMSCN in MeCN; the reaction is significantly promoted by the catalytic amount of cerium(III) chloride at ambient temperature in excellent yields without any adverse effect on the other substituents. The method afforded an elegant alternative to the synthesis of α‐aminonitriles. The reactions are fast and clean, and the products obtained are of high purity

Ni(NO3)2·6H2O/I2/water: A new, mild and efficient system for the selective oxidation of alcohols into aldehydes and ketones under sonic condition

A new, simple, efficient and rapid method for the oxidation of alcohols into respective aldehydes and ketones by Ni(NO3)2· 6H2O/I2/water system under ultrasonic irradiation is reported. The process is mild and inexpensive; the yields are high and the reactions go to completion within 2-7 min. © 2012 Elsevier B.V. All rights reserved

Selective reduction of azoarenes into arylamine(s) by aluminum / NH4Br under sonic conditions

Azoarenes, both sym. and unsym. are cleaved into arylamine​/s by aluminum metal and ammonium bromide in refluxing methanol with high yields. The rate of the reaction is greatly accelerated by irradiating at 35 kHz in a sonic bath maintained at 25 °C

Regiospecific Reduction of Oxetanes with Lithium under Aprotic Conditions

Substituted oxetanes have been found to give exclusively terminal alcohols by regiospecific ring-opening with lithium and biphenyl (cat.) in THF at reflu