6533b861fe1ef96bd12c5700

RESEARCH PRODUCT

1‐Oxa‐3‐cyclooctin

Herbert MeierSilke RothEvaggelia StavridouWinfried Mayer

subject

Inorganic ChemistrySteric effectsFragmentation (mass spectrometry)ChemistryStereochemistryAcetoacetic ester synthesisMNDOTriple bondRing (chemistry)Ring strain

description

1-Oxa-3-cyclooctyne According to an MNDO calculation, 1-oxa-cyclooctyne (13) and 1-oxa-3-cyclooctyne (14) are 8-membered heterocyclic ring systems with high steric energy (ring strain). On the basis of THF (1) and acetoacetic ester (4), a multi-step synthesis is described for 14. The triple bond is introduced in the last step by a thermal fragmentation of the 1,2,3-selenadiazole 12.

https://doi.org/10.1002/cber.19901230634