Vinylic Cations from Solvolysis. 39. Solvolysis of 9-(α-Bromo- and α-(tosyloxy)-p-methoxybenzylidene)xanthenes

Article abstract of DOI:10.1021/jo00175a015

The solvolysis of 9-(α-bromo-p-methoxybenzylidene)xanthene (5) and its α-tosyloxy analogue 6 was investigated.In 80percent EtOH/2,6-lutidine 5 forms the 9-ethoxy derivative 8 and 9-(4-methoxybenzoyl)xanthene (9).The titrimetric rate constant k_t