The reaction of dodec-11-ene-1, 6-diynes or their heteroatom congeners with a hydrosilane catalyzed by Rh (acac)(CO) 2 at ambient temperature and pressure of CO gives the corresponding fused 5-7-5 tricyclic products, 5-oxo-1, 3a, 4, 5, 7, 9-hexahydro-3 H- cyclopenta [e] azulenes or their heteroatom congeners, in excellent yields through a unique silicon-initiated cascade carbonylative carbotricyclization (CO-SiCaT) process. It has also ...
