Sankyo Company, Limited

Yuichi Sugano

Keiichi Matsuda

Shunji Naruto

Tomiichiro Oda

Novel benzene derivatives are provided of the general formula (I): ##STR1## [wherein R.sup.1 represents an amino group, a substituted amino group, a protected amino group, or a nitro group; R.sup.2 represents an amino group, a substituted amino group, a protected amino group, a hydroxy group, a substituted hydroxy group, or a protected hydroxy group; R.sup.3 represents an amino group, a substituted amino, a heterocyclyl group having a ring nitrogen atom as the point of binding, or a substituted heterocyclyl group having a ring nitrogen atom as the point of binding; m is 0 to 2; n is 0 to 6; with the proviso that when m is 0, then n represents an integer from 2 to 6] and salts thereof. Compounds of formula (I) except those wherein R.sup.1 is a nitro group have activity in promoting production of nerve growth factor. Compounds of formula (I) wherein R.sup.1 is a nitro group are intermediates for compounds of formula (I) wherein R.sup.1 is an amino group.

Benzene derivatives having NGF production-promoting activity

A compound of the formula (I): ##STR1## wherein R.sup.1 is an unsubstituted or substituted amino group, a protected amino group, or a nitro group; R.sup.2 is an unsubstituted or substituted amino group, a protected amino group, an unsubstituted or substituted hydroxy group or a protected hydroxy group; R.sup.3 is an unsubstituted or substituted amino group, m is 0 to 2; n is 0 to 6; with the proviso that when m is 0, then n is an integer from 2 to 6, and pharmaceutically acceptable salts thereof. Compounds of formula (I) except those wherein R.sup.1 is a nitro group have activity in promoting the production of nerve growth factor.

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Tokyo, Japan

Yuichi Sugano