80368-99-6Relevant academic research and scientific papers
Interleukin-4 gene expression inhibitors
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, (2008/06/13)
This invention discloses and claims a class of indole and benzo(b)thiophene derivatives for use in treating allergy, asthma, rhinitis, dermatitis, B-cell lymphomas, tumors and diseases associated with bacterial, rhinovirus or respiratory syncytial virus (RSV) infections. The compounds of this invention are defined by the Formula (I): wherein X, Y, Z, R1, R2 and R3 are as defined in the specification; or a pharmaceutically acceptable salt thereof. In preferred embodiments of this invention it is also disclosed and claimed that the compounds of this invention are capable of modulating T helper (Th) cells, Th1/Th2, and thereby capable of inhibiting the transcription of interleukin-4 (IL-4) message, IL-4 release or IL-4 production.
Acyloxymethyl as a drug protecting group. Part 7: Tertiary sulfonamidomethyl ester prodrugs of benzylpenicillin: Chemical hydrolysis and anti-bacterial activity
Iley, Jim,Barroso, Helena,Moreira, Rui,Lopes, Francisca,Calheiros, Teresa
, p. 1629 - 1636 (2007/10/03)
Tertiary sulfonamidomethyl esters of benzylpenicillin (4) were synthesised and evaluated as a new class of potential prodrugs for β-lactam antibiotics. Their hydrolysis in aqueous buffers was studied by HPLC and reveal a U-shaped pH-rate profile with a pH-independent process extending from ca. pH 2 to ca. pH 10. This pathway is characterised by kinetic data that are consistent with a unimolecular mechanism involving rate-limiting iminium ion formation and penicillinoate expulsion. Benzylpenicillin and the corresponding sulfonamide are the ultimate products detected and isolated, indicating that β-lactam ring opening is much slower than ester hydrolysis. As expected from the high reactivity, benzylpenicillin esters (4) displayed similar in vitro antibacterial activity to benzylpenicillin itself. Compared to the benzylpenicillin derivatives, sulfonamidomethyl esters of benzoic, clofibric and valproic acids display a much higher stability, giving rise to a Bronsted β(lg) value of -0.96 and suggesting that tertiary sulfonamidomethyl esters may be useful prodrugs for carboxylic acid drugs with pK(a)>4. Copyright (C) 2000 Elsevier Science Ltd.
