Novel C.sub.3 -substituted cyclodeca-1,5-diynes can be prepared through novel synthetic procedures using starting (E)-C.sub.3 -substituted-4-(aryl- or heteroarylmethylidene)cyclodeca-1,5-diynes reagents. Both the C.sub.3 -substituted cyclodeca-1,5-diyn-3-enes and the starting reagents have improved thermal stability compared to unsubstituted counterparts.

Novela C.sub.3 - cyclodeca-1,5-diynes substituido se puede preparar con procedimientos sintéticos de la novela usando comenzar (E)-C.sub.3 - reactivo de substituted-4-(aryl- o de heteroarylmethylidene)cyclodeca-1,5-diynes. Ambos los C.sub.3 - cyclodeca-1,5-diyn-3-enes substituidos y los reactivo que comenzaban han mejorado la estabilidad termal comparada a las contrapartes sin sustituir.