On January 30, 2003, Bhalay, Gurdip; Howe, Trevor John; Le Grand, Darren Mark; Walker, Clive Victor published a patent.Electric Literature of 490021-97-1 The title of the patent was Preparation of azetidine-containing amides and their use as CCR-3 receptor antagonists. And the patent contained the following:
The invention relates to azetidine derivatives (I; variables defined below; e.g. (E)-N-[(S)-1-tert-butoxymethyl-3-[3-(4-fluorophenoxy)azetidin-1-yl]propyl]-3-(5-cyano-2-methoxyphenyl)acrylamide) in free or salt form. Compositions containing them, methods for their preparation and their use as pharmaceuticals are also described. The agents of the invention act as CCR-3 receptor antagonists, thereby inhibiting the infiltration and activation of inflammatory cells, particularly eosinophils, and inhibiting allergic response. The effect of agents of the invention on the binding of human eotaxin to human CCR-3 was determined Eighteen I have IC50 values <1 μM in the above assay. For instance, (E)-N-[(S)-1-tert-butoxymethyl-3-[3-(4-fluorophenoxy)azetidin-1-yl]propyl]-3-(5-cyano-2-methoxyphenyl)acrylamide has an IC50 value of 1 nM. Most of the 18 I exhibit selectivity for inhibition of CCR-3 binding relative to inhibition of binding of the alpha-1 adrenergic receptor. Eighteen example preparations of I are included. For example, the above I was prepared via intermediates [(S)-1-tert-butoxymethyl-3-iodopropyl]carbamic acid benzyl ester, [(S)-1-tert-butoxymethyl-3-[3-(4-fluorophenoxy)azetidin-1-yl]propyl]carbamic acid benzyl ester, and (S)-1-tert-butoxymethyl-3-[3-(4-fluorophenoxy)azetidin-1-yl]propylamine. For I: Ar1 is Ph substituted by ≥1 halogen atoms; Ar2 is Ph optionally substituted by ≥1 halogen, cyano, hydroxy, nitro, C1-C8-alkyl, C1-C8-haloalkyl, C1-C8-alkoxy, C1-C8-alkoxycarbonyl or di(C1-C8-alkyl)aminocarbonylmethoxy; R1 is H or C1-C8-alkyl optionally substituted by hydroxy, C1-C8-alkoxy, acyloxy, halogen, carboxy, C1-C8-alkoxycarbonyl, -N(R2)R3, -CON(R4)R5 or by a monovalent cyclic organic group having 3-15 atoms in the ring system. R2 and R3 are each independently H or C1-C8-alkyl, or R2 is H and R3 is hydroxy-C1-C8-alkyl, acyl, -SO2R6 or -CON(R4)R5, or R2 and R3 together with the N atom to which they are attached denote a 5- or 6-membered heterocyclic group; R4 and R5 are each independently H or C1-C8-alkyl, or R4 and R5 together with the N atom to which they are attached denote a 5- or 6-membered heterocyclic group; R6 is C1-C8-alkyl, C1-C8-haloalkyl, or Ph optionally substituted by C1-C8-alkyl; X is -C(O)-, -O- or -CH2-; and n is 1, 2, 3 or 4. The experimental process involved the reaction of 3-(4-Chlorophenoxy)azetidine hydrochloride(cas: 490021-97-1).Electric Literature of 490021-97-1
The Article related to azetidine amide preparation ccr3 receptor antagonist, Heterocyclic Compounds (One Hetero Atom): 4-Membered Rings and other aspects.Electric Literature of 490021-97-1
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