MODELS FOR THE HOMOGENEOUS HYDRODESULFURIZATION OF BENZOTHIOPHENE - SEQUENTIAL INSERTION OF MANGANESE INTO THE C(ARYL)-S AND C(VINYL)-S BONDS, FOLLOWED BY METALLATHIACYCLE RING CONTRACTION
Ca. Dullaghan et al., MODELS FOR THE HOMOGENEOUS HYDRODESULFURIZATION OF BENZOTHIOPHENE - SEQUENTIAL INSERTION OF MANGANESE INTO THE C(ARYL)-S AND C(VINYL)-S BONDS, FOLLOWED BY METALLATHIACYCLE RING CONTRACTION, Organometallics, 16(26), 1997, pp. 5604-5606
Coordination of Mn(CO)(3)(+) to the carbocyclic ring of benzothiophene
s activates the C(aryl)-S bond to reductive cleavage, affording metall
athiacycle 5. When the 7-R substituent in 5 is methyl or ethyl (but no
t hydrogen), rapid C(vinyl)-S bond scission ensues to give isomer 6, w
hich subsequently undergoes a metallathiacycle ring contraction to yie
ld complex 7.