摘要:
A compound of the general formula in which X represents a chlorine or bromine atom, R¹ represents a hydrogen atom, a C(1-6) alkyl group, a benzyl group or a phenyl group optionally substituted by a C(1-6) alkyl group, and R² represents the group CN or the group COOR³ in which R³ represents a C(1-6) alkyl group, a process for the preparation of a compound of formula (I), and the use of a compound of formula (I) in the preparation of a compound of the general formula. in which R¹ is as defined above and R⁴ represents an amino group or a hydroxyl group.
摘要:
A process for the preparation of 3-aminothiophenes or acid-addition salts thereof, which comprises reacting the corresponding 3-oxotetrahydrothiophenes with an acid-addition salt of hydroxylamine in the presence of a polar inert solvent and in the absence of a base at a temperature in the range of from 0 to 200°C.
摘要:
A compound of the general formula in which X represents a chlorine or bromine atom, R¹ represents a hydrogen atom, a C(1-6) alkyl group, a benzyl group or a phenyl group optionally substituted by a C(1-6) alkyl group, and R² represents the group CN or the group COOR³ in which R³ represents a C(1-6) alkyl group, a process for the preparation of a compound of formula (I), and the use of a compound of formula (I) in the preparation of a compound of the general formula. in which R¹ is as defined above and R⁴ represents an amino group or a hydroxyl group.