- Microwave-assisted solvent-free Diels-Alder reaction - A fast and simple route to various 5,6-substituted norbornenes and polychlorinated norbornenes
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A series of 5,6-substituted norbornenes and 5,6-substituted polychlorinated norbornenes was prepared by using a microwave-assisted Diels-Alder reaction. This procedure proved very versatile, fast, and with an easy workup step, and therefore suitable even for large-scale synthesis. Georg Thieme Verlag Stuttgart · New York.
- Dejmek, Milan,Hrebabecky, Hubert,Sala, Michal,Drainsky, Martin,Nencka, Radim
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experimental part
p. 4077 - 4083
(2012/01/05)
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- ENZYMATIC ACYLATION USING ACID ANHYDRIDES: CRUCIAL REMOVAL OF ACID
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An efficient enzymatic resolution of 7,7-disubstituted 1,4,5,6-tetrachlorobicyclohept-5-en-2-ols was accomplished by means of lipase AY-30 from Candida cylindracea in toluene.When acid anhydrides were used as acyl donors, the enantioselectivity was found to depend strongly on the reaction conditions: Whereas low selectivity (E 200).Alternatively, adsorption of the biocatalyst onto Celite was equally effective (E >300).Complete specificity was obtained when vinyl acetate was used as acyl donor (E ca.1000).
- Berger, B.,Rabiller, C. G.,Koenigsberger, K.,Faber, K.,Griengl, H.
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p. 541 - 546
(2007/10/02)
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