Efficient and general asymmetric syntheses of (R)-chroman-4-amine salts
摘要:
Starting from a variety of substituted chroman-4-ones, a highly enantioselective CBS reduction using in situ-generated B-H catalyst gave (S)-chroman-4-ols. Azide inversion and reduction gave crude (R)-chroman-4-amines, which could be purified without chromatography by isolation as the (R)-mandelic or D-tartaric acid salts with good yields and excellent ee. (C) 2010 Elsevier Ltd. All rights reserved.
Disclosed herein are compounds of formula (I), or pharmaceutically acceptable salts, solvates, prodrugs, salts of prodrugs, or combinations thereof,
wherein R
1
, R
2
, R
3
, R
4
, and m are defined in the specification. Compositions comprising such compounds and methods for treating conditions and disorders using such compounds and compositions are also disclosed.
Disclosed herein are compounds of formula (I) or pharmaceutically acceptable salts, solvates, prodrugs, salts of prodrugs, or combinations thereof,
wherein R1, R2, R3, R4, and m are defined in the specification. Compositions comprising such compounds and methods for treating conditions and disorders using such compounds and compositions are also disclosed.
A solid dispersion product comprising at least one N-aryl urea-based pharmaceutically active agent or an agent of related structural type is obtained by a) preparing a liquid mixture containing the at least one active agent, at least one pharmaceutically acceptable matrix-forming agent, at least one pharmaceutically acceptable surfactant and at least one solvent, and b) removing the solvent(s) from the liquid mixture to obtain the solid dispersion product.