Green Chemistry - Environmentally Benign Approaches by M. Kidwai, N. Mishra

By M. Kidwai, N. Mishra

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M. , Khan, R. A. R. & Yadav, R. P. (2007). Efficient Method for the Manufacture of (E)-Entacapone Polymorphic for a. United States Patent, 2007, Patent No: 0004935 Okkerse, C. and van Bekkum, V. (1999). From Fossil to Green. 2, (April 1999), pp. , Tagliapietra, S. & Cravotto, G. (2011). Ultrasound-enhanced one-pot synthesis of 3-(Het)arylmethyl4-hydroxycoumarins in water. 2, (March 2011), pp. 652-660, ISSN 1350-4177 Pratap, U. , Jawale, D. , Waghmare, R. , Lingampalle, D. L. & Mane, R. A. (2011).

M. (1991). The atom economy – a search for synthetic efficiency. 5037, (Dec 1991), pp. 1471-1477, ISSN 0036-8075 Varma, R. S. (2002). Clay and clay-supported reagents in organic synthesis. 7, (February 2002), pp. , Santamarta, F. & Tojo, E. (2011). Knoevenagel Reaction in [MMIm][MSO4]: Synthesis of Coumarins. 6, (June 2011), pp. 4379-4388, ISSN 1320-3049 Wada, S. & Suzuki, H. (2003). Calcite and fluorite as catalyst for the Knoevenagel condensation of malononitrile and methyl cyanoacetate under solvent-free conditions.

0% after eight minutes (Fig. 24) (Mogilaiah & Reddy, 2003). 0% NH2 (77) O N (78) N (76) Fig. 24. Synthesis of the Friedlander condensation product (76). 8 Knoevenagel reactions using solid phase organic synthesis An innovative and important field of organic synthesis involves the use of solid phase organic synthesis (Czarnik, 2001). This new methodology was introduced by Merrifield in 1963 when he used it to synthesise amino acids (Merrifield, 1963). Solid phase organic synthesis uses insoluble polymers that covalently bond organic substrates to the solid surface until the synthesis is complete, at which point the compound of interest is separated from the solid matrix (Czarnik, 2001).

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