Asymmetric synthesis of α,α-disubstituted α-amino alcohol derivatives
摘要:
We herein report an asymmetric synthesis of alpha,alpha-disubstituted alpha-amino alcohol derivatives 3, key intermediates of a novel immunomodulator, using enzymatic desymmetrization of 2-alkyl-2-tert-butoxycarbonylamino-1,3-propanediols 1a and 1b. This method makes it possible to prepare a chiral analogue of FTY720 4. These synthetic procedures allow for a broad structure variation in order to evaluate structure-activity relationships and the mechanism of action for sphingosine 1-phosphate-1 (SIP1) receptor agonist. (c) 2006 Elsevier Ltd. All rights reserved.
A pharmaceutical composition is provided that has a low toxicity, demonstrates superior physicochemical properties and pharmacokinetics, and has superior peripheral blood lymphocyte count lowering activity. The pharmaceutical composition contains a compound having general formula (I):
[Chemical Formula 1]
(wherein R
1
represents a methyl group or an ethyl group, R
2
represents a methyl group or an ethyl group, and R
3
represents a phenyl group substituted with 1 to 3 substituents selected from the group consisting of a halogen atom, a lower alkyl group, a cycloalkyl group, a lower alkoxy group, a halogeno lower alkyl group, a lower aliphatic acyl group and a cyano group), a pharmacologically acceptable salt thereof or a pharmacologically acceptable ester thereof.
Method for suppressing the number of peripheral blood lymphocytes using an amino alcohol compound
申请人:Sankyo Company, Limited
公开号:US07910617B2
公开(公告)日:2011-03-22
A method for suppressing the number of peripheral blood lymphocytes involving administering to a human in need thereof a pharmaceutically effective amount of a compound which is (2R) -2-amino-2-methyl-4-1-methyl-5-[4-(4-methylphenyl)butanoyl]pyrrol-2-yl}butan-1-ol or a pharmacologically acceptable salt thereof, such as the hydrochloride salt.
We herein report an asymmetric synthesis of alpha,alpha-disubstituted alpha-amino alcohol derivatives 3, key intermediates of a novel immunomodulator, using enzymatic desymmetrization of 2-alkyl-2-tert-butoxycarbonylamino-1,3-propanediols 1a and 1b. This method makes it possible to prepare a chiral analogue of FTY720 4. These synthetic procedures allow for a broad structure variation in order to evaluate structure-activity relationships and the mechanism of action for sphingosine 1-phosphate-1 (SIP1) receptor agonist. (c) 2006 Elsevier Ltd. All rights reserved.