The following invention relates to a process for oxidizing alkyl groups attached directly or via a linker, to a sulfonamide moiety (II) by the use of cytochrome P450 enzymes, to give the corresponding alcohol or carboxylic acid (I).
1
wherein R is an organic radical, X is a linker, Y is —C(CH
3
)
2
— or —CH(CH
3
)— and Z is —CH
2
OH or —COOH.
Compounds of formulae (IA) and (IB):
wherein R1, R2, R3, Ar1 and X are as defined above, are endothelin antagonists. The compounds are therefore useful in the treatment of a variety of conditions mediated by endothelin, such as restenosis, renal failure and systemic and pulmonary hypertension.
Compounds of formulae (IA) and (IB):
wherein R1, R2, R3, Ar1 and X are as defined above, are endothelin antagonists. The compounds are therefore useful in the treatment of a variety of conditions mediated by endothelin, such as restenosis, renal failure and systemic and pulmonary hypertension.
式(IA)和(IB)的化合物:
其中 R1、R2、R3、Ar1 和 X 如上文所定义,是内皮素拮抗剂。因此,这些化合物可用于治疗由内皮素介导的各种疾病,如血管再狭窄、肾功能衰竭、全身性和肺性高血压。