By V.K. Ahluwalia
ISBN-10: 1402031750
ISBN-13: 9781402031755
ISBN-10: 9401571023
ISBN-13: 9789401571029
Organic chemistry has performed an essential function within the improvement of various molecules that are utilized in medicinal drugs, agrochemicals and polymers. such a lot ofthe chemical substances are produced on an commercial scale. the commercial homes undertake a synthesis for a selected molecule which could be cost effective. No realization is paid to prevent the discharge of destructive chemical substances within the surroundings, land and sea. in the past decade unique emphasis has been made in the direction of eco-friendly synthesis which circumvents the above difficulties. Prof. V. ok. Ahluwalia and Dr. M. Kidwai have made a honest attempt during this path. This e-book discusses the elemental rules of eco-friendly chemistry incorporating using eco-friendly reagents, eco-friendly catalysts, section move catalysis, eco-friendly synthesis utilizing microwaves, ultrasound and biocatalysis intimately. certain emphasis is given to liquid part reactions and natural synthesis within the sturdy section. i need to congratulate either the authors for his or her pioneering efforts to put in writing this booklet. cautious number of a number of issues within the publication will serve the rightful goal for the chemistry neighborhood and the commercial homes in any respect degrees. PROF. JAVED IQBAL, PhD, FNA amazing learn Scientist & Head Discovery study Dr. Reddy's Laboratories Ltd.
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These add on to olefins in situ to give dimethyl vinylidinecyclopropanes (Scheme 10). Use of PTC technique with aqueous NaOH gives better yields and is more convenient. 20 R-CH-CH-R \/ C (CH 3hC-C=CH Base RCH=CH.. II I .. (CH 3)2 C=C=C: C Cl anhyd. conditIOn V' l·d b my I ene car ene II 3-Chloro-3-methylC H3 C ................ 5 Elimination Reactions (a) Dehydrohalogenation can be achieved by the reaction of alkyl halides with aq. NaOH in presence ofPTC. T R H-CH 2R' PTC ---;~.. RCH=CHR' Br (b) The vic-dibromoalkanes can be neatly debrominated21 by the PTC process using sodium thiosulphate with a catalytic amount of sodium iodide (Scheme 11).
1975,40,1966. 11. M. M. , 1972,3281. 12. B. A. , 1973, 1627. 13. WR. Roush, D. , 1974, 1391. 14. J. Frechet, J Org. , 1976,41,3877. (b) W Heitz and R. Michels, Angew. Chern. Int. , 1972, 11,298. 15. A. Crossby and M. Katu, J Arn. Chern. , 1977,99,278. 16. E. Williams, Can. , 1971,49,3764. 17. K. Ahluwalia and Renu Aggarwal, Organic Synthesis: Special Techniques, Narosa Publishing House, New Delhi, 2001, pp. 150-190 and the references cited therein. 1. 2. 3. 4. 5. 7. Green Catalysts Some of the major advances in chemistry especially industrial chemistry, over the past decade have been in the area of catalysts.
These add on to olefins in situ to give dimethyl vinylidinecyclopropanes (Scheme 10). Use of PTC technique with aqueous NaOH gives better yields and is more convenient. 20 R-CH-CH-R \/ C (CH 3hC-C=CH Base RCH=CH.. II I .. (CH 3)2 C=C=C: C Cl anhyd. conditIOn V' l·d b my I ene car ene II 3-Chloro-3-methylC H3 C ................ 5 Elimination Reactions (a) Dehydrohalogenation can be achieved by the reaction of alkyl halides with aq. NaOH in presence ofPTC. T R H-CH 2R' PTC ---;~.. RCH=CHR' Br (b) The vic-dibromoalkanes can be neatly debrominated21 by the PTC process using sodium thiosulphate with a catalytic amount of sodium iodide (Scheme 11).
New Trends in Green Chemistry by V.K. Ahluwalia
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