Synthesis and Conformation of cis-1,2-Disubstituted Cyclododecene
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摘要:
Eight 1,2-disubstituted cyclododecenes were synthesized from a-alkoxycarbonyl-cyclododecanone and alkyl chloroformate. Their configuration and conformation determined by IR, NMR spectroscopy and X-ray diftraction analysis showed that the carbon-carbon double bond of all of the synthesized compounds has cis-configuration, and the ring skeleton of their preferred conformation is [lene2333] in solid, and they may adopt two different [lene2333]conformations, which exist in a dynamic equilibrium in solution.