Nodulisporic Acid A, a Novel and Potent Insecticide from a Nodulisporium Sp. Isolation, Structure Determination, and Chemical Transformations.-In continuation of a program for biologically active natural products the novel title indole terpene (I) is isolated and the structure investigated by spectroscopic analysis. The relative stereochemistry of the eastern and western hemisphere of (I) and its methyl ester is independently determined. Results are confirmed by an X-ray analysis of a derivative and its absolute stereochemistry is established. -(ONDEYKA, J. G.; HELMS, G. L.; HENSENS, O. D.; SINGH, S. B.; ET AL.; J.

Vilsmeier formylation of the trimetallic species {(C 5 Me 4 H)Fe(C 5 Me 4 )CH 2 C 5 H 4 } 2 Fe (1) gives {(C 5 Me 4 CHO)Fe(C 5 Me 4 )CH 2 C 5 H 4 } 2 Fe (2) and a triformylated product 3, the structure of which has been established by a 1 H: 1 H NOESY experiment. 2 can be converted, by three additional steps, to the new [1 4 ]ferrocenophane, (C 5 H 4 CH 2 C 5 Me 4 ) 4 Fe 4 (8), in which ferrocene and permethylated ferrocene units alternate. The methodology also permits the synthesis of heteronuclear species comprising two permethylated ferrocenylene units, a ferrocenylene unit, and a heterometallocenylene; thus, {(C 5 H 4 CH 2 C 5 Me 4 ) 4 Fe 3 Co} + PF 6 -(10) has been characterized.