Special Issue

Herbert C. Brown's Special Issues, Vol. 18, No. 1, 1982

63 data found. 61 - 63 listedFirst Previous
Review | Special issue | Vol 18, No. 1, 1982, pp. 397 - 410
Published online:
DOI: 10.3987/S(B)-1982-01-0397
■ New Organometallic Approaches to Heterocycles

Richard C. Larock*

*Department of Chemistry, Iowa State University, Ames, Iowa 50011, U.S.A.

Abstract

The mercuration of acetylenes and subsequent palladium promoted reactions provides a new route to butenolides, furans, benzofurans, isocoumarins, and benzopyrones, while thallation-palladation of appropriately substituted arenes affords phthalides, 3,4-dihydroisocoumarins, aryl anhydrides and imides, and isocoumarins.

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Review | Special issue | Vol 18, No. 1, 1982, pp. 411 - 419
Published online:
DOI: 10.3987/S(B)-1982-01-0411
■ 2,6-Di-t-butylpyridine — An Unusual Base

Bernard Kanner*

*Union Carbide Corporation, Tarrytown Technical Center, Tarrytown, NewYork 10591, U.S.A.

Abstract

2-6,Di-t-butylpyridine has been investigated because of its extraordinary combination of properties. As the result of steric crowding at the nitrogen atom, it does not coordinate with Lewis acids or undergo quaternization under ordinary conditions. However, it is readily sulfonated by sulfur trioxide and is a selective catalyst with basic but not nucleophilic properties.

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Review | Special issue | Vol 18, No. 1, 1982, pp. 421 - 449
Published online:
DOI: 10.3987/S(B)-1982-01-0421
■ Some New O-Ethylboron-assisted Carbohydrate Transformations

Wihelm Volker Dahlhoff* and Roland Köster

*Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim / Ruhr, Germany

Abstract

New aspects and uses of O-ethylboron-carbohydrate chemistry, such as controlled glycosidations, high-yield syntheses of boron-protected halogenoses and the stereoselective, boron-assisted, glycosylations of the latter are described.

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63 data found. 61 - 63 listedFirst Previous