1977, 42, 1197;         [ Links ]Corey, E. J.; Becker, K. B.; Varma, R. K.; J. water under ultrasound irradiation. Richard A. Kjonaas, Richard W. Fitch, and Robert J. Noll .

Soc. You have to login with your ACS ID befor you can login with your Mendeley account. Thus, benzaldehyde was subjected to four different reduction protocols: reaction with NaBH4 followed by HCl, reaction with NaBD4 followed by HCl, reaction with NaBH4 followed by DCl, and reaction with NaBD4 followed by DCl. [ Links ], 21. Firouzabadi, H.; Afsharifar, G. R.; Bull. Jpn. 2002, 32, 315;         [ Links ]Mirjalili, B. F.; Zolfigol, M. A.; Bamoniri, A.; Molecules 2002, 7, 751;         [ Links ]Shirini, F.; Zolfigol, M. A.; Mallakpour, S. E.; Hajipour, A. R.; Mohammadpoor-Baltork, I.; Tetrahedron Lett. AlfaAesar Catalogue of Fine Chemicals, 2005. [ Links ], 17.

Cross-Course Collaboration in the Undergraduate Chemistry Curriculum: Isotopic Labeling with Sodium Borodeuteride in the Introductory Organic Chemistry Laboratory. Soc. [ Links ], 13. J.

Chem. Chem. Benzaldehyde reduction under dihydrogen atmosphere (H 2) Before testing under a dihydrogen flow, the oxides were in situ activated for 2 h at 350 °C in a current of H 2. 1995, 16, 1009;         [ Links ]Cha, J. S.; Kim, E. J.; Kwon, O. O.; Bull. Trans. 1991, 21, 2275;         [ Links ]Yoon, N. M.; Choi, J.; Synlett 1993, 135;         [ Links ]Sim, T. B.; Ahn, J. H.; Yoon, N. M.; Synthesis 1996, 324;         [ Links ]Bram, G.; D´Incan, E.; Loupy, A.; J. Chem. [ Links ], 20. The authors gratefully appreciate the financial support of this work by the research council of Urmia University.

Fast and efficient method for reduction of carbonyl compounds with NaBH4 /wet SiO2 under solvent free condition, Department of Chemistry, Faculty of Sciences, Urmia University, Urmia 57159-165, Iran. These reductions were also efficient and the reactions were completed within 3-42 min with high to excellent yields of the corresponding secondary alcohols (94-99%) (Table 3). Regioselectivity of this system was also investigated with exclusive 1,2-reduction of conjugated carbonyl compounds to their corresponding allylic alcohols in high to excellent yields. [ Links ], 24. Chem.

Reduction of aldehydes [LiAlH4] Reduction of aldehydes [LiAlH 4] Definition:. Products were isolated and analyzed by GC-MS. ABCR GmbH Chemicals Co., http://www.abcr.de, accessed in May 2005. Soc. [ Links ], 3. Reduction of Aldehydes and Ketones. Elem.

Demonstration of Diastereoselectivity in the Undergraduate Organic Chemistry Laboratory. methodology, we further investigated the prospective of, Performing a reaction without the use of solvent usually. Next, we turned our attention to the reduction of ketones with the experiment in which acetophenone was used as a model compound. Find more information on the Altmetric Attention Score and how the score is calculated. TLC was monitored the progress of reaction (eluent; CCl4/Et2O: 5/2). All reagents and substrates were purchased from commercial sources with the best quality and were used without further purification. Rev.

C, encyclopedia of chemicals, drugs, and biologicals. Proced. Ethanol was distilled off, solution was extracted 3 times with diethylether. Zeynizadeh, B.; Bull. TLC was applied for the purity determination of substrates, products and reaction monitoring over silica gel 60 F254 aluminum sheet. In addition, the need for large amounts of NaBH4 (tenfold) is a serious limitation for this method.12 Reduction of aldehydes and ketones with NaBH4 impregnated on neutral Al2O3 under microwave irradiation has also been reported. On the other hand, sodium borohydride is relatively mild reducing agent, primarily used for the reduction of reactive functional groups in protic solvents. [ Links ], 16. 1993, 58, 5981;         [ Links ]Sande, A. R.; Jagadale, M. H.; Mane, R. B.; Salunkhe, M. M.; Tetrahedron Lett. 1991, 1847;         [ Links ]Hutchins, R. O.; Kandasamy, D.; J. Org. The usefulness of this protocol was further shown with the reduction of a-diketones and acyloins to their vicinal diols in shorter reaction times and excellent yields. The major shortcoming of this method is that it takes a long time for any practical application. We then applied this optimal condition for the reduction of structurally different aliphatic and aromatic aldehydes.

This fact was demonstrated with the selective reduction of benzaldehyde over acetophenone using 0.5 molar equivalent of NaBH4 at room temperature under solvent free condition (Scheme 2).


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