SULFOXIDE DERIVATIVES AND THEIR PREPARATION

摘要

NOVEL SULFOXIDE DERIVATIVES AND THEIR PREPARATION Novel sulfoxide derivatives showing a gastric acidsecretion inhibitory effect which have the formula (I): (I) wherein each of R1 and R2 independently is hydrogen or a lower alkyl group, and each of R3, R4, R4a and R4b independently is hydrogen, halogen, a lower alkoxy group, a lower alkyl group, trifluoromethyl, or a fluorine atomcontaining lower alkoxy group. Other novel sulfoxide derivatives are also disclosed.