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Unusually large scalar coupling between geminal protons in saturated pyrimidine
(Concepts in Magnetic Resonance Part A;Volume 45A, Issue 6, 2018-04-29)
An unusually large geminal coupling has been observed in a stereochemically rigid system that permits a favorable coupling alignment between the methylene protons and an adjacent carbon-carbon double bond. Such couplings ...
Challenges in the Highly Selective [3 + 1]-Cycloaddition of an Enoldiazoacetamide to Form a Donor–Acceptor Cis-Cyclobutenecarboxamide
A substituted donor–acceptor cyclobutenecarboxamide is synthesized with modest enantiocontrol through a chiral copper(I) complex catalyzed [3 + 1]-cycloaddition reaction of ?-acyl diphenylsulfur ylides with 3-siloxy-2-di ...