Hypochlorite oxidation'" of 1'1 to thidnaphtlirrie-2-cdrboxylic acid, ni. p. 240-241.5'3i~~2was effected in 75% yield. The infrared absorption spectra of the pure ketones V and VI as well as the spectrum of the mixture are found in Fig. 1. Quantitative analysis of the mixture by infrared analysis showed it t o consist of 75% Y ,ind 2570
\'I.
Acylation of Thiophene with Acetic Anhydride. fa) Stannic Chloride a s the Catalyst.-The addition 01 1.3 g. of
