Isosteric ramatroban analogs: selective and potent CRTH-2 antagonists
摘要:
The chemoattractant receptor-homologous molecule expressed on T(H)2 cells (CRTH-2), also found on eosinophils and basophils, is a prostaglandin D-2 receptor involved in the recruitment of these cell types during an inflammatory response. In this report, we describe the synthesis and optimization of a ramatroban isostere that is a selective and potent antagonist of CRTH-2 which may be useful in the treatment of certain diseases. © 2004 Elsevier Ltd. All rights reserved.
[3,3]-Sigmatropic rearrangement of N-triflluoroacetyl enehydrazines provides a novel method for the construction of indoles. N-Trifluoroacetyl enehydrazine having a cyclopentene ring smoothly underwent [3,3]-sign-tatropic rearrangement followed by cyclization to give indolines in excellent yield. On the other hand, both cyclohexenyl N-trifluoroacetyl enchydrazine and acyclic N-trifluoroacetyl enehydrazine gave indoles in good yield. Additionally, the substituent effect on the benzene ring was also studied. The rearrangement of N-trifluoroacetyl enchydrazines proceeded smoothly even Linder either aqueous or solvent-free conditions. (c) 2006 Elsevier Ltd. All rights reserved.
Plant, Journal of the Chemical Society, 1929, p. 2497
作者:Plant
DOI:——
日期:——
CCCIII.—The action of nitric acid on polycyclic indole derivatives. Part XI. Combined addition and substitution