Publication

The Diels-Alder Chemoselectivity of 3,4,6,7-Tetramethylidenebicyclo[3.2.1]Octane-2-Exo,8-Syn-Diyl Derivatives

Pierre Vogel
1992
Journal Articles

Abstract

Strong dienophiles prefer to add onto the diene moiety attached at C(2),C(3) of 2,3,6,7-tetramethylidenebicyclo[3,2,1]octane ((+/-)-1; see Scheme 1), whereas in the case of 3,4,6,7-tetramethylidenebicyclo[3.2.1]octane-2-exo,8-syn-diyl derivatives. the diene moiety at C(6),C(7) reacts faster than that at C(3),C(4), as long the bulk of the 8-syn-substituent is large enough (see Schemes 2 and 3).

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Pierre Vogel
1992
Journal Articles

Abstract

Official source

Related concepts (25)

Scheme (mathematics)

In mathematics, a scheme is a mathematical structure that enlarges the notion of algebraic variety in several ways, such as taking account of multiplicities (the equations x = 0 and x2 = 0 define the same algebraic variety but different schemes) and allowing "varieties" defined over any commutative ring (for example, Fermat curves are defined over the integers). Scheme theory was introduced by Alexander Grothendieck in 1960 in his treatise "Éléments de géométrie algébrique"; one of its aims was developing the formalism needed to solve deep problems of algebraic geometry, such as the Weil conjectures (the last of which was proved by Pierre Deligne).

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