1,2-Cyclic Sulfamidates as Versatile Precursors to Thiomorpholines and Piperazines
摘要:
Graphics1,2-Cyclic sulfamidates undergo regiospecific nucleophilic displacement with either methyl thioglycolate or a-amino esters, followed by lactamization (thermal, base-mediated, or cyanide-catalyzed), to give thiomorpholin-3-ones and piperazin-2-ones.
Regioselectivity in a Highly Efficient, Microwave-Assisted Epoxide Aminolysis
作者:Harriet Lindsay、Hinal Desai、Brendan D’Souza、Devin Foether、Benjamin Johnson
DOI:10.1055/s-2007-965927
日期:2007.3
We have developed a microwave-assisted aminolysis of epoxides as an efficient method for synthesizing a number of β-amino alcohols. In most cases, including in reactions of amines with a trisubstituted epoxide, only one equivalent of amine is required to obtain good yields. The reactions are consistently regioselective for amine nucleophiles of varying strengths and for both hindered and unhindered epoxides. In some cases, this regioselectivity could be enhanced by using a polar aprotic or a non-polar solvent.
[EN] AMIDE DERIVATIVES AS LYSOPHOSPHATIDIC ACID RECEPTOR ANTAGONISTS<br/>[FR] DÉRIVÉS AMIDES UTILISÉS EN TANT QU'ANTAGONISTES DES RÉCEPTEURS DE L'ACIDE LYSOPHOSPHATIDIQUE
申请人:TAKEDA PHARMACEUTICAL
公开号:WO2015025164A1
公开(公告)日:2015-02-26
The present invention provides compounds of formula (I) and pharmaceutically acceptable salts thereof, formula (I) wherein R1. X, m. R2, Y, R3, Z, n, R4. A and B are as defined in the specification, processes for their preparation, pharmaceutical compositions containing them and their use in therapy.
Sulfated zirconia and SZ/MCM-41 were used as catalysts for the synthesis of β-aminoalcohols via epoxide aminolysis. Sulfated zirconia was prepared by sol-gel andSZ/MCM-41 was obtained by impregnation. Solid catalysts were characterized by XRD,SEM-EDS, UV-Vis, FT-IR pyridine desorption and Nitrogen physisorption. Both acidmaterials were useful as catalysts, even when they were recycled several times. The β-aminoalcohols were characterized by FT-IR, 1H- and 13C-NMR and GC-MS.