SCHEDULED MAINTENANCE
Synthesis of intermediate 13 possessing the perhydropyrido[2,1,6-de]quinolizine skeleton of the coccinelline alkaloids and conversion to epi-hippodamine 20 was accomplished with stereochemical control arising from a key cycloaddition reaction of nitrone 2 with ethyl hexa-3,5-dienoate.
D. R. Adams, W. Carruthers and P. J. Crowley, J. Chem. Soc., Chem. Commun., 1991, 1261 DOI: 10.1039/C39910001261
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