Stereo-and regioselective total synthesis of the hydropyrido [2, 1, 6-de] quinolizine ladybug defensive alkaloids

RH Mueller, ME Thompson…

Index: Mueller, Richard H.; Thompson, Mark E.; DiPardo, Robert M. Journal of Organic Chemistry, 1984 , vol. 49, # 12 p. 2217 - 2231

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Citation Number: 38

Abstract

Ladybugs are well-known for their voracious appetites for such agricultural pests as aphids and scale insects; 2 in fact, they are commercially available for just this purpose? Interestingly, ladybugs have few natural enemies, a fact suggested by the bright coloration of many ladybug species; this" aposematic coloration" warns potential predators of the existence of a chemical defense~ ystem.~ When from their joints which repulses ants, ...