Ak. Gadad et al., SYNTHESIS AND LOCAL-ANESTHETIC ACTIVITY OF SOME THOXY-ANILIDO-4,5,6,7-TETRAHYDROBENZO[B]THIOPHENES, Indian journal of chemistry. Sect. B: organic chemistry, including medical chemistry, 33(3), 1994, pp. 298-301
Twenty new 2-substituted ino-3-carbetboxy/anilido-4,5,6,7-tetrahydrobe
zo[b] thiophenes (4a-4t) have been synthesised with a view to studying
the effect of structural modification of carticaine (B) on the local
anaesthetic activity and evaluated by Sollman's method as well as Bulb
ring and Wajda method using lignocaine hydrochloride as a standard. Al
l the tested compounds show moderate to good activity and 4a has been
found to be the most active drug comparable to the standard.