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US 6,320,081 B1Granted
O-Nitro(thio)phenol derivatives, and their preparation
AssigneeInfineon Technologies AG
InventorsMichael Keitmann, Recai Sezi, Andreas Weber
Life of this patent
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Abstract
The invention relates to novel o-nitrophenol derivatives and o-nitrothiophenol derivatives of the following structure: where: A1 to A3 are—independently of one another—H, F, CH3, CF3, OCH3, OCF3, CH2CH3, CF2CF3, OCH2CH3 or OCF2CF3; T is O or S; R is an aliphatic or araliphatic radical; and R* is H or R.
Claims13
An o-nitrophenol or o-nitrothiophenol derivative of the structure
- in which:
- each of A1 to A3 is a ring substituent independently selected from H, F, CH3, CH2CH3, CF3, CF2CF3, OCH3, OCF3, OCH2CH3 or OCF2CF3;
- each T=O only or each T=S only;
- R=alkyl, alkoxyalkyl, alkenyl, alkoxyalkenyl, alkynyl or alkoxyalkynyl, each having a maximum of 6 carbon atoms, phenyl, C6H5COCH2 or benzyl, and benzylalkyl, benzylalkenyl, benzyloxyalkyl, benzyloxyalkenyl, benzylalkoxyalkyl or benzylalkoxyalkenyl, each having a maximum of four aliphatic carbon atoms;
- R*=H or R;
- provided that, in the o-nitrophenol derivative (1), when R is allyl or benzyl the TH group is in the m-position to the TR group and provided that in the o-nitrophenol derivative (1) R is not alkyl;
- and provided further that on each ring in the o-nitrophenol derivative (2) not more than one of the ring substituents A1 to A3 can be OCH3.
4 more elements
An o-nitrophenol or o-nitrothiophenol derivative of the structure
- in which:
- each of A1 to A3 is a ring substituent independently selected from H, F, CH3, CH2CH3, CF3, CF2CF3, OCH3, OCF3, OCH2CH3 or OCF2CF3;
- T=O:
- R is a benzyl group [.], and
- R*=H or R;
- provided that, in the o-nitrophenol derivative (1), the TH croup is in the m-position to the TR group;
- and provided further that on each rind in the o-nitrophenol derivative (2) not more than one of the ring substituents A1 to A3 can be OCH3.
4 more elements
An o-nitrophenol or o-nitrothiophenol derivative of the structure
- in which:
- each of A1 to A3 is fluorine;
- each T=O only or each T=S only;
- R=alkyl, alkoxyalkyl, alkenyl, alkoxyalkenyl, alkynyl or alkoxyalkynyl, each having a maximum of 6 carbon atoms, phenyl, C6H5COCH2 or benzyl, and benzylalkyl, benzylalkenyl, benzyloxyalkyl, benzyloxyalkenyl, benzylalkoxyalkyl or benzylalkoxyalkenyl, each having a maximum of four aliphatic carbon atoms;
- R*=H or R;
- provided that, in the o-nitrophenol derivative (1), when R is allyl or benzyl the TH group is in the m-position to the TR group and provided that in the o-nitrophenol derivative (1) R is not alkyl.
3 more elements
An o-nitrophenol or o-nitrothiophenol derivative having structure (2)
- in which:
- each of A1 to A3 in one ring is hydrogen and each of A1 to A3 in the other ring is fluorine;
- each T=O only or each T=S only;
- R=alkyl, alkoxyalkyl, alkenyl, alkoxyalkenyl, alkynyl or alkoxyalkynyl, each having a maximum of 6 carbon atoms, phenyl, C6H5COCH2 or benzyl, and benzylalkyl, benzylalkenyl, benzyloxyalkyl, benzyloxyalkenyl, benzylalkoxyalkyl or benzylalkoxyalkenyl, each having a maximum of four aliphatic carbon atoms;
- and
- R*=H or R.
3 more elements
Dependencies are inferred from the claim text.