ChemInform Abstract: ACETYLENE 11. MITT. REAKTION VON GRIGNARD‐VERBINDUNGEN MIT 1‐CHLOR‐ UND 1‐BROM‐BUTIN‐(2)

Mkryan, G. M.; Mkrtchyan, Anahit; Gasparyan, S. M.; Voskanyan, E. S.; Nazaryan, A. A.

doi:10.1002/chin.197447180

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2012

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“…For example, 2-butynyl halides 37 on treatment with Grignard reagents RMgBr provide hydrocarbons such as 3,4-dimethyl-1,2,4,5-hexatetraene ( 38 ), but the composition of the product mixture is anything but simple (Scheme 5) [32–36]. Not only are the three isomeric C 3 -coupling products 38 to 40 produced, but also those of 37 with the Grignard reagent, 41 and 42 (R = Et, n -Pr).…”

Section: Reviewmentioning

confidence: 99%

The chemistry of bisallenes

Hopf¹,

Μαρκόπουλος²

2012

Beilstein J. Org. Chem.

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SummaryThis review describes the preparation, structural properties and the use of bisallenes in organic synthesis for the first time. All classes of compounds containing at least two allene moieties are considered, starting from simple conjugated bisallenes and ending with allenes in which the two cumulenic units are connected by complex polycyclic ring systems, heteroatoms and/or heteroatom-containing tethers. Preparatively the bisallenes are especially useful in isomerization and cycloaddition reactions of all kinds leading to the respective target molecules with high atom economy and often in high yield. Bisallenes are hence substrates for generating molecular complexity in a small number of steps (high step economy).

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Section: Reviewmentioning

confidence: 99%