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1.
Rahim Hekmatshoar Issa Yavari Yahya S. Beheshtiha Majid M. Heravi 《Monatshefte für Chemie / Chemical Monthly》2001,132(6):689-691
Summary. In the presence of metallic zinc, aldehydes and ketones experience reductive coupling in tetrahydrofuran-saturated aqueous
ammonium chloride (5:3) to afford the corresponding pinacols in moderate to high yields.
Received October 23, 2000. Accepted (revised) December 12, 2000 相似文献
2.
Rahim Hekmatshoar Issa Yavari Yahya S. Beheshtiha Majid M. Heravi 《Monatshefte für Chemie / Chemical Monthly》2001,7(7):689-691
In the presence of metallic zinc, aldehydes and ketones experience reductive coupling in tetrahydrofuran-saturated aqueous ammonium chloride (5:3) to afford the corresponding pinacols in moderate to high yields. 相似文献
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《Phosphorus, sulfur, and silicon and the related elements》2013,188(10):2111-2115
Reaction of trimethylsilyl cyanide with aliphatic or aromatic aldehydes and ketones in the presence of a catalytic amount of elemental iodine produced the corresponding cyanohydrin trimethylsilyl ethers in very short time and high yields. 相似文献
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Aldeydes and ketones are easily obtained in high yields by microwave promoted rapid oxidative deoximation of the corresponding oximes with zinc nitrate hexahydrate adsorbed on silica gel under solvent free conditions. 相似文献
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An expeditious synthetic method for the preparation of bis(indollyl)methane derivatives has been developed through a bismuth nitrate-catalyzed reaction of indole with various carbonyl compounds in mortar and pastle under solvent-free conditions. 相似文献
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In the presence of 1 mol% of trimethylsilyl bis(fluorosulfonyl)imide, trimethylsilyl cyanide adds efficiently to carbonyl compounds. The catalyst has been found to be more active than trimethylsilyl triflate for the above reaction. 相似文献
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Majid M. Heravi Mahmood Tajbakhsh Setareh Habibzadeh Mitra Ghassemzadeh 《Phosphorus, sulfur, and silicon and the related elements》2013,188(10):2299-2302
An environmentally benign, efficient, and mild methodology for the cleavage of phenylhydrazones using potassium ferrate under microwave irradiation in solvent-free conditions is described. 相似文献
9.
Mohammad Ali Zolfigol Ardeshir Khazaei Arash Ghorbani-Choghamarani Amin Rostami 《Phosphorus, sulfur, and silicon and the related elements》2013,188(11):2453-2458
The regeneration of carbonyl compounds from oximes were performed by using silica chromate and wet SiO 2 (w/w 50%) under microwave irradiation and solvent-free conditions with excellent yields. 相似文献
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Farhad Shirini Mohammad A. Zolfigol Abdol-Reza Abri 《Monatshefte für Chemie / Chemical Monthly》2008,139(1):17-20
Summary. Alcohols and phenols are efficiently converted to their corresponding trimethylsilyl ethers with hexamethyldisilazane (HMDS) in the presence of Fe(HSO4)3 in solution and under solvent-free conditions. 相似文献
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Ferrocenyl imines 3a–f were synthesized using solvent-free methods by mixing ferrocene carbaldehyde 1 with amines 2a–f under microwave irradiation. The imines were obtained in good yield in short reaction times. 相似文献
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Cu(NO3)2 supported on silica gel can be used as an effective and mild oxidizing agent for the direct conversion of oximes to carbonyl compounds under microwave irradiation in good yield. 相似文献
14.
M. M. Mojtahedi M. R. Saidi M. Bolourtchian M. M. Heravi 《Phosphorus, sulfur, and silicon and the related elements》2013,188(2):289-292
Phenols and alcohols are silylated with hexamethyldisilazane (HMDS) under microwave irradiation in solvent-free condition in good to excellent yields. 相似文献
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Solvent-free oxidative synthesis of benzimidazoles from arylmethylamines and o-phenylenediamine has been achieved under catalyst-free conditions. This reaction can use tert-butyl hydroperoxide (TBHP) as the oxidant, and a wide variety of derivatives were obtained in good yields. The reaction mechanism was proposed and this method provides a direct and practical approach for the preparation of substituted benzimidazoles. 相似文献
17.
For about 20 yeers the chemisty of low-valent titanium complexes has received great attention1 and now many of the reactions involving them are commonly used in synethesis2. The reactivity, of the low-valent titanium slurries, obtained after reduction of titanium trichloride or titanium tetrachloride by means of strong reducting agents such as magnesium, zinc in tetrahydrofuran has also been studied3-4. In 1995,we reported that carbonyl compounds react with ethyl trichloracetate and iodoacetonitrile in a PbCl2/Ga bimetal redox system5. Herein, we report reductive coupling reaction of carbonyl compound to afford E-alkenes with TiCl4/Ga bimetal redox system. Simplicity of produre and moderate to excellent yields of product. 相似文献
18.
Selective oxidation of alcohols to corresponding carbonyl compounds is one of the most important processes both in academic and application research. As a kind of biomimetic catalyst, metalloporphyrins‐catalyzed aerobic oxidation of alcohols with aldehyde as hydrogen donator is gathering much attention. However, using olefins as another kind hydrogen donator for aerobic oxidation of alcohols has not been reported. In this study, a system comprising managenese porphyrin and cyclohexene for biomimetic aerobic oxidation of alcohols to carbonyl compounds was developed. The catalytic system exhibited excellent catalytic performance and selectivity towards the corresponding products for most primary and secondary alcohols under mild conditions. Based on the results obtained from experiments as well as in situ EPR (electron paramagnetic resonance) and UV‐vis spectroscopy, the role of cyclohexene was demonstrated. 相似文献
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A green, efficient, and large-scale method for tetrahydropyranylation of alcohols in the presence of a catalytic amount of pyridinium chloride at room temperature under solvent-free conditions is reported. 相似文献