Novel substituted 1,3-dihydrospiro[isobenzofuran]s and methods of preparing the same are described. These compounds are useful as tranquilizers, analgetic agents and intermediates therefor.
A compound of the formula:
1
wherein Ar is optionally substituted phenyl, etc.; n is 0, 1 or 2;
R
1
is hydogen atom, optionally substituted alkyl, etc.; R
2
and R
3
are independently optionally substituted alkyl, etc.;
R
4
and R
5
are independently hydrogen atom or optionally substituted alkyl; R
6
is hydrogen atom, hydroxy or alkyl;
or a pharmaceutically acceptable salt thereof is useful as a medicament for treating retinal degenerative disorders and the like.
A compound of the formula:
wherein
Ar is optionally substituted phenyl, etc. ; n is 0, 1 or 2;
R1 is hydogen atom, optionally substituted alkyl, etc. ; R2 and R3 are independently optionally substituted alkyl, etc. ;
R4 and R5 are independently hydrogen atom or optionally substituted alkyl; R6 is hydrogen atom, hydroxy or alkyl;
or a pharmaceutically acceptable salt thereof is useful as a medicament for treating retinal degenerative disorders and the like.